UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2025

Commission File Number: 001-15092

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

(Translation of registrant’s name into English)

Turkcell Küçükyalı Plaza

Aydınevler Mahallesi İnönü Caddesi No:20

KüçükyalıOfispark

34854 Maltepe
Istanbul, Türkiye

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annualreports under cover of Form 20-F or Form 40-F:

x Form 20-F  ¨ Form 40-F

Enclosure: A press release dated August 13, 2025 announcingthe release of the registrant’s financial results for the 2nd quarter 2025.

Contents

	HIGHLIGHTS	4
	QUARTER HIGHLIGHTS	4
	COMMENTS BY CEO, ALİ TAHA KOÇ, PhD	5

	FINANCIAL AND OPERATIONAL REVIEW	7
	FINANCIAL REVIEW OF TURKCELL GROUP	7
	OPERATIONAL REVIEW OF TURKCELL TÜRKİYE	10

	TECHFIN	12
	Paycell	12
	Financell	12

	TURKCELL GROUP SUBSCRIBERS	13

	OVERVIEW OF THE MACROECONOMIC ENVIRONMENT	13

	RECONCILIATION OF NON-GAAP FINANCIAL MEASUREMENTS	14

	RECONCILIATION OF ARPU	15

	Appendix A – Tables	17

Please note that all financial data is consolidated and comprises that of Turkcell Iletisim Hizmetleri A.S. (the “Company” or “Turkcell”) and its subsidiaries and associates (together referred to as the “Group”) unless otherwise stated.

Our revenue segmentation was revised as of Q1 2025. Within this scope, all past data have been restated for comparability purposes. For a comprehensive explanation, please refer to the Press Release and the Excel file for Q1 2025, available on the Turkcell IR website.

We have three reporting segments:

"Turkcell Türkiye," which comprises our telecom, digital services, and digital business services related businesses, retail channel operations, smart devices management, and consumer electronics sales through digital channels in Türkiye. All non-financial data presented in this press release is unconsolidated and comprises Turkcell Türkiye only unless otherwise stated. The terms "we," "us," and "our" in this press release refer only to Turkcell Türkiye, except in discussions of financial data, where such terms refer to the Group, and except where context otherwise requires.

“Techfin” which comprises all of our financial services businesses.

“Other” which primarily comprises our international, energy businesses, non-group call center, and intersegment eliminations.

This press release provides a year-on-year comparison of our key indicators. Figures in parentheses following the operational and financial results for June 30, 2025, refer to the same item as of June 30, 2024. For further details, please refer to our consolidated financial statements and notes as of and for June 30, 2025, accessible via our website in the investor relations section (www.turkcell.com.tr).

Selected financial information presented in this press release for the second quarter of 2024 and 2025 is based on IFRS figures in TRY terms unless otherwise stated.

In the tables used in this press release, totals may not foot due to rounding differences. The same applies to the calculations in the text.

Year-on-year percentage comparisons in this press release reflect mathematical calculations.

NOTICE

This press releasecontains the Company’s financial information for the period ended June 30, 2025, prepared in accordance with InternationalFinancial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”). Thispress release contains the Company’s financial information prepared in accordance with International Accounting Standard 29, FinancialReporting in Hyperinflationary Economies (“IAS29”). Therefore, the financial statement information included in this pressrelease for the periods presented is expressed in terms of the purchasing power of the Turkish Lira as of June 30, 2025. The Companyrestated all non-monetary items in order to reflect the impact of the inflation restatement reporting in terms of the measuring unitcurrent as of June 30, 2025. Comparative financial information has also been restated using the general price index of the currentperiod.

This release includesforward-looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933, Section 21E of the U.S. SecuritiesExchange Act of 1934, and the Safe Harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. This includes, inparticular, and without limitation, our targets for consolidated revenue growth, data center and cloud revenue growth, EBITDA margin,and operational capex over sales ratio for the full year 2025. In establishing such guidance and outlooks, the Company has used a certainnumber of assumptions regarding factors beyond its control, particularly in relation to macroeconomic indicators, such as expected inflationlevels, that may not be realized or achieved. More generally, all statements other than statements of historical facts included in thispress release, including, without limitation, certain statements regarding our operations, financial position, and business strategy,may constitute forward-looking statements. Forward-looking statements can generally be identified by the use of forward-looking terminologysuch as, among others, “will,” “expect,” “intend,” “estimate,” “believe,” “continue,” and “guidance.”

Forward-lookingstatements are not guarantees of future performance and involve certain risks and uncertainties that are difficult to predict. In addition,certain forward-looking statements are based upon assumptions as to future events that may not prove to be accurate. Many factors couldcause the actual results, performance, or achievements of the Company to be materially different from any future results, performance,or achievements that may be expressed or implied by forward-looking statements. Should one or more of these risks or uncertainties materializeor underlying assumptions prove incorrect, actual results may vary materially from those described herein as anticipated, believed, estimated,expected, intended, planned, or projected.

These forward-lookingstatements are based upon a number of assumptions and other important factors that could cause our actual results, performance, or achievementsto differ materially from our future results, performance, or achievements expressed or implied by such forward-looking statements. Allsubsequent written and oral forward-looking statements attributable to us are expressly qualified in their entirety by reference to thesecautionary statements. For a discussion of certain factors that may affect the outcome of such forward- looking statements, see our AnnualReport on Form 20-F for 2024 filed with the U.S. Securities and Exchange Commission, and in particular, the risk factor sectiontherein. These forward-looking statements should not be relied upon as representing the Company’s views as of any date subsequentto the date of this press release. All forward-looking statements in this press release are based on information currently availableto the Company, and we undertake no duty to update or revise any forward-looking statements, whether as a result of new information,future events, or otherwise.

The Company makesno representation as to the accuracy or completeness of the information contained in this press release, which remains subject to verification,completion, and change. No responsibility or liability is or will be accepted by the Company or any of its subsidiaries, board members,officers, employees, or agents as to or in relation to the accuracy or completeness of the information contained in this press releaseor any other written or oral information made available to any interested party or its advisers.

FINANCIAL HIGHLIGHTS

TRY million	Q224			Q225			y/y%			H124			H125			y/y%
Revenue		47,150			53,022			12.5	%		92,274			103,866			12.6	%
EBITDA¹		20,105			23,086			14.8	%		38,777			45,304			16.8	%
EBITDA Margin (%)		42.6	%		43.5	%		0.9	pp		42.0	%		43.6	%		1.6	pp
EBIT²		6,322			8,818			39.5	%		11,479			17,525			52.7	%
EBIT Margin (%)		13.4	%		16.6	%		3.2	pp		12.4	%		16.9	%		4.5	pp
Net Income		3,922			4,201			7.1	%		7,779			7,468			(4.0	%)

SECOND QUARTERHIGHLIGHTS

In line with the dividend resolution adopted at the 2024 Annual General Assembly, the first installment of dividend, amounting TRY4.0 billion, was distributed to shareholders on June 20, 2025.

Solid financial performance surpassed expectations

Group revenues increased by 12.5% year-on-year primarily due to Turkcell Türkiye’s strong ARPU growth as well as the increase in hardware revenues supported by digital business services. The Techfin segment also contributed positively to group revenues, posting a solid 23.1% growth. Meanwhile, our Data Center & Cloud business — a key pillar of our strategy — delivered 53.2% year-over-year growth, further reinforcing our confidence in its long-term potential.

EBITDA¹ increased by 14.8%, leading to an EBITDA margin of 43.5%, marking a yearly improvement of 0.9pp; EBIT² was up by 39.5%, resulting in an EBIT margin of 16.6%.

Profit from continuing operations recorded remarkable growth of 36.8%, generating TRY4.4 billion. Net income rose by 7.1% to TRY4.2 billion.

Net leverage³ level at 0.29x, indicating a healthy position compared to peers

Net short FX position of US$102 million in line with our neutral FX definition, which is between plus and minus US$200 million

Supporting both engines of growth – proactively managing the subscriber portfolio in intense market conditions and consistently delivering real ARPU growth

Recorded the highest mobile postpaid net additions in 5.5 years – 816 thousand

Dedicated postpaid focus – 78% postpaid subscriber base share

20 thousand total fiber net additions, including resell operations

Sustained real ARPU growth in a volatile environment; Mobile ARPU⁴growth of 9.8%, residential fiber ARPU growth of 17.5%

6.1 million total homepasses; 67 thousand new fiber homepasses this quarter

(1) EBITDAis a non-GAAP financial measure. See page 14 for the explanation of how we calculate Adjusted EBITDA and its reconciliation to netincome.

(2) EBIT isa non-GAAP financial measure and equals EBITDA minus depreciation and amortization expenses.

(3) Our netdebt calculation includes financial assets at fair value, whether through other comprehensive income or through profit and loss, reportedunder current and non-current assets, as well as financial assets at amortized cost. Required reserves held in CBRT balances are notincluded in total cash and net debt calculation, and this change has been reflected in previous quarters’ figures

(4) ExcludingM2M

COMMENTSBY CEO, ALİ TAHA KOÇ, PhD

DeliveringStrong Results in the Second Quarter of 2025

Weclosed the first half of 2025 with robust results, supported by our superior infrastructure, thetrust we have earned from our customers, and our steadfast commitment to strategic priorities. Even in a highly competitive environment,we sustained healthy and profitable growth while advancing Türkiye's digital transformation through targeted technology and infrastructureinvestments. This solid financial and operational performance strengthens our confidence in achieving our year-end targets.

Inthe second quarter, through tailored offers and pricing strategies designed specifically for eachsegment, we delivered the highest quarterly net subscriber additions on the postpaid side in the past five and a half years, while maintainingour profitability focus. Consolidated revenues in the second quarter rose 12.5% year-on-year to TRY 53.0 billion, driven by strong ARPUgrowth, an expanding subscriber base, and substantial contributions from our Techfin and digital business services. EBITDA¹increased 14.8% to reach TRY 23.1 billion, with the EBITDA margin improving by 0.9 percentage points year-on-year to 43.5%. Net incomegrew 7.1% compared with the previous year, reaching TRY 4.2 billion.

Healthy GrowthDriven by Outstanding Subscriber Net Additions and Strong ARPU Performance

Thecompetitive environment in the telecommunications sector remained as anticipated in the second quarter.Building on strong ARPU growth from the first quarter and leveraging the granular subscriber management model introduced this quarter,we executed our campaigns and offers with greater agility and precision, delivering a strong performance. By focusing on our customers’needs and tailoring differentiated value propositions for specific sub-segments, we achieved 816 thousand net postpaid mobile subscriberadditions in the second quarter - the highest figure in the past five and a half years. The share of postpaid subscribers in our totalmobile base rose by 5 percentage points year-on-year to reach 78%. This increase, combined with targeted pricing adjustments and effectiveupselling efforts, drove a 9.8% rise in mobile ARPU (excluding M2M) in the second quarter. Reflecting our customer-focused innovationapproach, we embraced the “Turkcell Solves It” mindset and, with the launch of the Tumbara service, continued to deliversolutions that make our customers’ daily lives easier. At the heart of our market-differentiating dynamic pricing and campaignstrategies is our commitment to meeting customer demands and expectations. Guided by this focus, we will continue enhancing the servicewe provide to each customer in the coming period.

Meanwhile,by expanding our capacity and accelerating the fiberization of our base stations, we continued tostrengthen our infrastructure for the arrival of 5G and invest in Türkiye’s digital future. On the fixed broadband side, wegrew our network by connecting 67 thousand new households to our end-to-end fiber infrastructure. Including fiber services deliveredover other ISPs' infrastructures (resell), we connected a total of 20 thousand new subscribers to fiber internet. The share of subscribersusing speeds of 100 Mbps and above in our fixed segment rose by 16 percentage points year-on-year. Supported by our growth-driven strategyin the Turkcell fiber business, targeted price adjustments, and rising customer demand for high-speed internet, residential fiber ARPUposted a strong year-on-year increase of 17.5% in the second quarter.

Paycell:Driving Growth in the Techfin Segment

OurTechfin business, comprising the Paycell and Financell brands, accounts for 6% of our consolidatedrevenues and continued to make a strong contribution to group performance, growing by 23.1% in the second quarter. Paycell, which enablescustomers to securely manage their daily financial needs - from mobile payments to investments, and from bill payments to money transfers- all within a single app, has become the driving force of our Techfin segment, achieving revenue growth of 35.8%. This performance wasfueled primarily by increased volume in our POS business and the addition of new customers.

Addressingthe diverse financing needs of its customers, Financell continued to expand its product portfolioduring the period with loan offerings designed to improve access to consumer technology. In the first quarter, we launched the foreigncurrency loan module. In addition, the “Small Business Device Loan” product - tailored for sole proprietors within the consumersegment - now provides access to both financing and device insurance. Supported by higher average interest rates, Financell’s revenuesrose 4.7% year-on-year, while net interest margin (NIM) improved by 2.9 percentage points to reach 4.9%.

LeadingTürkiye’s Tech and Communications Landscape with a Clear Sense of Responsibility

Wecontinue to see rising demand in the data center and cloud business, where we have been investingfor years with the aim of positioning our country as a regional data hub. Each quarter provides further confirmation of the strengthof our strategic positioning. Backed by years of expertise, Turkcell maintains its leadership and continues to expand in the data centerindustry. Driven by strong market demand and the successful monetization of past capacity investments, data center and cloud revenuesrose by a solid 53.2% year-on-year.

Aspart of our investment strategy in key areas such as data centers, cloud technologies, and renewableenergy, we signed murabaha financing agreements with leading financial institutions in the Gulf region during the second quarter. Theseagreements - our first based on interest-free (Islamic) financing from the Gulf region - both diversify our debt portfolio and underscoreTurkcell’s strong reputation in international markets. We are confident these steps will strengthen our long-term strategic investmentsand make a significant contribution to our country’s development.

AsTürkiye’s leading technology and communications company, we continue forward with determination,fully aware of the responsibilities entrusted to us. I would like to extend my sincere thanks to our Board of Directors for their strategicguidance, to all Turkcell employees for their dedication, and to our customers and partners for their continued trust and collaboration.

(1) EBITDAis a non-GAAP financial measure. For details on how we calculate Adjusted EBITDA and its reconciliation to net income, please refer topage 14.

FINANCIALAND OPERATIONAL REVIEW

Financial Reviewof Turkcell Group

	Quarter									Half Year
Profit & Loss Statement (million TRY)	Q224			Q225			*y/y%*			H124			H125			*y/y%*
Revenue		47,150.2			53,021.9			*12.5*	%		92,273.9			103,865.5			*12.6*	%
Cost of revenue¹		(22,041.1	)		(24,311.2	)		10.3	%		(43,925.1	)		(47,202.5	)		7.5	%
Cost of revenue¹/Revenue		(46.7	)%		(45.9	)%		*0.8*	pp		(47.6	)%		(45.4	)%		*2.2*	pp
Gross Margin¹		53.3	%		54.1	%		*0.8*	pp		52.4	%		54.6	%		*2.2*	pp
Administrative expenses		(1,617.2	)		(1,975.4	)		22.1	%		(3,317.0	)		(4,095.9	)		23.5	%
Administrative expenses/Revenue		(3.4	)%		(3.7	)%		*(0.3*	*)pp*		(3.6	)%		(3.9	)%		*(0.3*	*)pp*
Selling and marketing expenses		(3,047.8	)		(3,341.5	)		9.6	%		(5,621.4	)		(6,749.5	)		20.1	%
Selling and marketing expenses/Revenue		(6.5	)%		(6.3	)%		*0.2*	pp		(6.1	)%		(6.5	)%		*(0.4*	*)pp*
Net impairment losses on financial and contract assets		(339.5	)		(308.0	)		(9.3	)%		(633.6	)		(513.7	)		(18.9	)%
EBITDA²		20,104.6			23,085.8			*14.8*	%		38,776.7			45,303.9			*16.8*	%
EBITDA Margin		42.6	%		43.5	%		*0.9*	pp		42.0	%		43.6	%		*1.6*	pp
Depreciation and amortization		(13,782.6	)		(14,267.8	)		3.5	%		(27,298.0	)		(27,779.0	)		1.8	%
EBIT³		6,321.9			8,817.9			*39.5*	%		11,478.7			17,524.8			*52.7*	%
EBIT Margin		13.4	%		16.6	%		*3.2*	pp		12.4	%		16.9	%		*4.5*	pp
Net finance income / (costs)		(2,011.5	)		(1,341.2	)		(33.3	)%		(1,776.1	)		(1,720.8	)		(3.1	)%
Finance income		2,122.2			2,891.5			36.3	%		5,522.4			7,085.3			28.3	%
Finance costs		(5,759.9	)		(5,058.9	)		(12.2	)%		(12,800.8	)		(10,648.7	)		(16.8	)%
Monetary gain / (loss)		1,626.2			826.1			(49.2	)%		5,502.3			1,842.6			(66.5	)%
Other income / (expenses)		(283.6	)		(194.5	)		(31.4	)%		(603.3	)		(671.2	)		11.3	%
Share of loss of equity accounted investees		(1,028.9	)		(1,204.2	)		17.0	%		(1,110.8	)		(2,120.1	)		90.9	%
Income tax expense		209.4			(1,690.1	)		(907.1	)%		(1,723.7	)		(5,357.6	)		210.8	%
Profit from continuing operations		3,207.3			4,387.9			*36.8*	%		6,264.8			7,655.2			*22.2*	%
Profit /(loss) from discontinued operations		713.2			(187.4	)		(126.3	)%		1,504.7			(187.4	)		(112.5	)%
Non-controlling interests		1.8			-			(100.0	)%		9.7			-			(100.0	)%
Net Income		3,922.3			4,200.5			*7.1*	%		7,779.2			7,467.8			*(4.0*	)%

(1) Excludingdepreciation and amortization expenses

(2) EBITDAis a non-GAAP financial measure. See page 14 for the explanation of how we calculate Adjusted EBITDA and its reconciliation to netincome.

(3) EBIT isa non-GAAP financial measure and equals EBITDA minus depreciation and amortization expenses.

Revenueof the Group rose 12.5% year-on-year in the second quarter of 2025. This resulted from the strong ARPUperformance of Turkcell Türkiye with a growing postpaid subscriber base, effective upsell efforts and solid Techfin business performanceof 23.1% on a yearly basis.

Inthe second quarter, the Turkcell Türkiye⁴ segment was the main driver of this performance,accounting for 91% of Group revenues and rising 11.8% to TRY48,220 million (TRY43,143 million).

–

Consumer business, representing 75% of Turkcell Türkiye, delivered 9.6% growth. Price increases, subscriber growth in mobile and fixed services, and strong upselling efforts supported this performance.

–

Corporate revenues, comprising 19% of the segment, increased by 27.3% thanks to high demand on Data Center & Cloud services and strong performance in hardware sales. Notably, Digital Business Services revenues increased by 39.1%, while the Data Center & Cloud business, a sub-segment of Digital Business Services, recorded 53.2% growth in the second quarter.

–

Wholesale revenues were up 1.1% to TRY2,305 million (TRY2,279 million).

(4) Our revenuesegmentation was revised as of Q1 2025. Within this scope, all past data have been restated for comparability purposes. For a comprehensiveexplanation, please refer to the Press Release and the Excel file for Q1 2025, available on the Turkcell IR website.

Techfin segmentrevenues, accounting for 6% of Group revenues, grew by 23.1% to TRY2,916 million (TRY2,369 million). Paycell continued its strong growthmomentum, recording 35.8% year-on-year growth in Q225. For details, please refer to the Techfin section.

Other¹segment revenues, comprising 4% of the Group’s top-line, which mostly include international business, energy business and non-groupcall center revenues, rose by 15.2% to TRY1,886 million (TRY1,638 million).

Costof revenue (excluding depreciation and amortization) decreased to 45.9% (46.7%) as a percentageof revenues for the second quarter of 2025. This was driven by the decline in personnel expenses (1.6pp), interconnection cost (0.4pp),funding cost (0.3pp), energy expenses (0.3pp) and other cost items (0.5pp), while the increase in cost of goods sold (1.7pp) and mobilepayment expense (0.5pp) as a percentage of revenues.

Administrativeexpenses increased to 3.7% (3.4%) as a percentage of revenues for this quarter. The primarydriver of this increase was the rise in personnel expenses.

Sellingand marketing expenses slightly decreased to 6.3% (6.5%) as a percentage of revenue.

Netimpairment losses on financial and contract assets were at 0.6% (0.7%) as a percentage of revenuein Q225.

EBITDA²increased by 14.8% year-on-year in Q225 leading to an EBITDA margin of 43.5% with a 0.9pp improvement (42.6%).

–

Turkcell Türkiye EBITDA was up by 13.6% to TRY21,838 million (TRY19,220 million), resulting in an EBITDA margin of 45.3% (44.5%).

–

Techfin segment EBITDA increased by 16.7% to TRY734 million (TRY630 million) with a 1.4pp contraction in EBITDA margin to 25.2% (26.6%). Lower funding costs more than compensated for the increase in mobile payment costs in Q225 as a percentage of revenues. The EBITDA contraction stemmed mainly from cost of collection risk management.

–

EBITDA of Other was at TRY513 million (TRY255 million).

Depreciationand amortization expenses increased by 3.5%, amounting to TRY14,268 million (TRY13,783 million).

Netfinance costs decreased to TRY1,341 million (TRY2,011 million) in the second quarter of 2025,despite the monetary gain item’s contribution being almost halved. This was driven mainly by decreasing net FX loss to TRY2,022million (TRY2,710 million) and effective balance sheet management.

See Appendix Afor details of net foreign exchange gain and loss.

Otherexpenses were TRY195 million (TRY284 million) in Q225.

Incometax expense amounted to TRY1,690 million (TRY209 million income) in Q225. This variance can beattributed to higher corporate tax, amounting TRY3,667 million, as the company's statutory financials reflected a tax-paying position.Deferred tax income rose to TRY1,977 million and partially offset corporate tax.

Profitfrom continuing operations delivered a solid performance, rising by 36.8% to TRY4,388 million(TRY3,207 million) in the second quarter of the year. As stated above, strong EBITDA, driven by robust operations, and lower net financecosts supported net income, while income tax expense had an adverse impact.

Netincome of the Group was up by 7.1% to TRY4,201 million (TRY3,922 million) in the second quarterof the year. Notably, discontinued operations contributed TRY713 million to net income in the same period last year due to the sale ofour Ukrainian business.

(1) Our revenuesegmentation was revised as of Q1 2025. Within this scope, all past data have been restated for comparability purposes. For a comprehensiveexplanation, please refer to the Press Release and the Excel file for Q1 2025, available on the Turkcell IR website.

(2) EBITDAis a non-GAAP financial measure. See page 14 for the explanation of how we calculate adjusted EBITDA and its reconciliation to netincome.

Totalcash & debt: Consolidated cash as of June 30, 2025, increased to TRY116,601 million,from TRY80,428 million as of December 31, 2024. Through the Eurobond issuance at the beginning of the year, we secured the financingrequired for the 5G auction in advance and on favorable terms. On the other hand, we distributed the first installment of dividends toour shareholders on June 20, 2025. Excluding FX swap transactions, 65% of our cash is in US$, 22% in EUR, 3% in CNY, and 9% in TRY.

Consolidateddebt as of June 30, 2025, increased to TRY172,858 million from TRY121,738 million as of December 31,2024. Note that TRY14,320 million of our consolidated debt comprises lease obligations. Additionally, 57% of our consolidated debt isin US$, 26% in EUR, 4% in CNY, and 12% in TRY.

Net debt¹,as of June 30, 2025, increased to TRY25,371 million from TRY12,497 million as of December 31, 2024, with a net debt to EBITDAratio of 0.29x.

Turkcell Grouphad a short net FX position of US$102 million at the end of this quarter (this figure takes hedging portfolio, advance payments and preciousmetal investments into account). The short FX position of US$102 million is in line with our FX neutral definition, which ranges from-US$200 million to +US$200 million.

Capitalexpenditures: Capital expenditures (CAPEX) amounted to TRY40,560 million in the first half ofthe year, with TRY24,231 million recorded in the second quarter. Operational capital expenditures (excluding license fees) accountedfor 16.9% and 18.5% of total revenues in Q225 and H125, respectively.

	Half Year
Capital expenditures (million TRY)	H124		H125
Operational Capex		19,447.5		19,217.8
License and Related Costs		18.6		219.5
Non-operational Capex (Including IFRS15& IFRS16)		8,440.2		21,123.1
IFRS15		4,972.4		4,826.8
IFRS16		3,358.8		12,957.7
Other		109.1		3,338.6
Total Capex		27,906.3		40,560.4

(1) Our netdebt calculation includes financial assets at fair value, whether through other comprehensive income or through profit and loss, reportedunder current and non-current assets, as well as financial assets at amortized cost. Required reserves held in CBRT balances are notincluded in total cash and net debt calculation, and this change has been reflected in previous quarters’ figures

OperationalReview of Turkcell Türkiye

	Quarters
Summary of Operational Data	Q224			Q125			Q225			*y/y %*			*q/q %*
Number of subscribers¹ (million)		43.2			43.1			43.5			*0.7*	%		*0.9*	%
Mobile Postpaid (million)		28.1			29.3			30.1			7.1	%		2.7	%
Mobile M2M (million)		4.7			5.3			5.4			14.9	%		1.9	%
Mobile Prepaid (million)		10.4			9.0			8.7			(16.3	)%		(3.3	)%
Turkcell Fiber² (thousand)		2,375.6			2,484.4			2,488.2			4.7	%		0.2	%
Resell Fixed Broadband² (thousand)		810.6			774.2			763.3			(5.8	)%		(1.4	)%
ADSL (thousand)		767.8			721.8			695.9			(9.4	)%		(3.6	)%
Cable (thousand)		38.1			33.1			31.3			(17.8	)%		(5.4	)%
Fiber (thousand)		4.7			19.3			36.0			666.0	%		86.5	%
Superbox³ (thousand)		746.4			660.0			654.9			(12.3	)%		(0.8	)%
IPTV (thousand)		1,484.4			1,456.3			1,430.0			(3.7	)%		(1.8	)%
Churn (%)⁴
Mobile Churn (%)		1.5	%		1.7	%		2.2	%		0.7	pp		0.5	pp
Fixed Churn (%)		1.2	%		1.4	%		1.7	%		0.5	pp		0.3	pp
Average mobile data usage per user (GB/user)		18.6			17.9			19.2			*3.2*	%		*7.3*	%

(1) Includesmobile, fixed broadband, IPTV, and wholesale (MVNO&FVNO) subscribers

(2) As ofthe fourth quarter of 2024, our fixed broadband subscriber reporting has been revised. Turkcell Fiber refers to customers served entirelythrough our own fiber infrastructure, while Turkcell Resell includes DSL, Cable, and Fiber sales provided through the infrastructuresof other ISPs. Accordingly, historical subscriber figures have been revised to ensure comparability.

(3) Superboxsubscribers are included in mobile subscribers.

(4) Churnfigures represent average monthly churn for the respective periods.

ARPU (Average Monthly Revenue per User)	Quarters
(TRY, IAS29 Adjusted)	Q224		Q125		Q225		y/y %			q/q %
Mobile ARPU, blended		283.6		301.0		306.4		8.0	%		1.8	%
Mobile ARPU, blended (excluding M2M)		320.9		344.6		352.5		9.8	%		2.3	%
Postpaid		326.1		346.7		350.5		7.5	%		1.1	%
Postpaid (excluding M2M)		388.8		416.5		423.0		8.8	%		1.6	%
Prepaid		170.2		155.5		158.1		(7.1	)%		1.7	%
Fixed Residential ARPU, blended		350.8		394.1		414.7		18.2	%		5.2	%
Residential Fiber ARPU		355.8		399.7		418.2		17.5	%		4.6	%

As the market leaderin the mobile segment, our primary objective is to sustain our strong market position. To this end, we adopt a dynamic and tailored approachto subscriber portfolio management by diversifying our value-added tariffs in line with evolving customer needs. This strategic focusdrives robust net additions, reinforcing our industry leadership and contributes ARPU growth as well. As a consequence of this strategy,we managed to add 816 thousand postpaid subscribers, marking our strongest performance in over five years. The share of postpaid subscribersin the total mobile subscriber base has thus reached 78%, representing an annual increase of five percentage points. As expected, theprepaid subscriber base declined to 8.7 million, primarily due to the rise of alternative data solutions and a customer shift towardpostpaid plans in response to inflationary pressures. Our mobile churn rate increased to 2.2% this quarter due to high volatility inthe mobile number portability market, which reached a record-high volume of 5.0 million transactions. Mobile ARPU (excluding M2M) recordeda 9.8% year-over-year increase, driven by price adjustments, successful upselling initiatives, and the notable expansion of our postpaidbase, which grew by 2.0 million over the past 12 months.

On the fixed side,our resell fiber base grew by 17 thousand during the quarter, largely driven by the launch of fiber services over the incumbent operator’sinfrastructure earlier this year. Turkcell Fiber recorded a net addition of 4 thousand subscribers. However, a decline of 26 thousandADSL subscribers, resulting from our profitability-driven approach in the resell segment, offset the total fiber net additions. Consequently,our fixed subscriber base remained broadly stable at 3.3 million as of the end of Q2 2025. Residential fiber ARPU rose by 17.5% year-over-year,fueled by the growing share of high-speed packages, a higher proportion of 12-month contracted subscribers, and price adjustments. Theshare of high-speed packages (100 Mbps and above) increased by 16 percentage points year-over-year this quarter.

As part of ourongoing efforts to expand our fiber footprint, we added 67 thousand new homepasses this quarter, bringing the total number of pure fiberhomepasses to 6.1 million.

TECHFIN

	Quarter							Half Year
Paycell Financial Data (million TRY)		Q224		Q225		y/y%			H124		H125		y/y%
Revenue		1,086.0		1,474.3		35.8	%		2,082.9		2,947.8		41.5	%
EBITDA		525.8		558.6		6.2	%		991.6		1,136.9		14.7	%
EBITDA margin (%)		48.4	%	37.9	%	(10.5	)pp		47.6	%	38.6	%	(9.0	)pp
Net income		236.4		305.8		29.4	%		344.8		502.9		45.9	%

Paycell sustainedits role as the primary growth engine of the Techfin segment this quarter, delivering 35.8% year-on-year revenue growth, driven primarilyby the POS business. POS services recorded 149% revenue growth fueled by rising transaction volumes and the onboarding of new merchants.Notably, 74% of Paycell’s revenues were generated from non-group clients, underscoring its growing success beyond the group ecosystem.Regarding profitability, the increasing share of POS within the revenue mix led to a decline in the EBITDA margin — a trend thatwas anticipated given the nature of the business model. Unlike many other payment companies, Paycell remains profitable and continuesto record a solid EBITDA margin by industry standards.

The total transactionvolume reached TRY39 billion in the second quarter of 2025, increasing by 75% year-on-year. POS volumes grew by 121%, driving the overallvolume increase.

	Quarter							Half Year
Financell Financial Data (million TRY)		Q224		Q225		y/y%			H124		H125		y/y%
Revenue		1,279.4		1,339.7		4.7	%		2,511.6		2,672.5		6.4	%
EBITDA		180.1		207.2		15.0	%		317.4		418.5		31.9	%
EBITDA margin (%)		14.1	%	15.5	%	1.4	pp		12.6	%	15.7	%	3.1	pp
Net income / (loss)		(51.6	)	45.1		n.m			(189.7	)	34.4		n.m

Financell sustainedits positive revenue growth performance of 4.7%, despite tight monetary conditions and TRY20,000 limit on 12-month installment plansfor smart phones. Key contributors to this growth were a higher average interest rate across the loan portfolio compared to the previousyear and the implementation of tailored pricing offers. The EBITDA margin increased by 1.4pp to 15.5% in this quarter due mainly to lowerfunding costs on a yearly basis.

Financell’sloan portfolio reached TRY7.3 billion in Q225. By the end of the second quarter, the company had 0.7 million active customers. Financellis the market leader in the consumer financing sector, holding a 52% market share¹ by number of loans.

(1) Source:Association of Financial Instuitions, as of Q125

TURKCELL GROUPSUBSCRIBERS

As of June 30,2025, the Turkcell Group had approximately 45.6 million registered subscribers. This figure is calculated by taking the number of subscribersof Turkcell Türkiye and of each of our subsidiaries. It includes the total number of mobile, fiber, ADSL, cable and IPTV subscribersof Turkcell Türkiye, as well as the mobile subscribers of BeST and Kuzey Kıbrıs Turkcell.

Turkcell Group Subscribers	Q224		Q125		Q225		y/y%			q/q%
Turkcell Türkiye subscribers¹ (million)		43.2		43.1		43.5		0.7	%		0.9	%
BeST (Belarus)		1.5		1.5		1.5		-			-
Kuzey Kıbrıs Turkcell		0.6		0.6		0.6		-			-
Turkcell Group Subscribers (million)		45.3		45.2		45.6		0.7	%		0.9	%

(1) Subscribersto more than one service are counted separately for each service. This includes mobile, fixed broadband, IPTV, and wholesale (MVNO&FVNO)subscribers.

OVERVIEW OFTHE MACROECONOMIC ENVIRONMENT

The foreign exchangerates used in our financial reporting, along with certain macroeconomic indicators, are presented below.

	Quarter															Half Year
	Q224			Q125			Q225			y/y%			q/q%			H124			H125			y/y%
GDP Growth (Türkiye)		2.4	%		2.0	%		n.a			*n.a*			*n.a*			3.8	%		n.a			*n.a*
Consumer Price Index (Türkiye)(yoy)		71.6	%		38.1	%		35.0	%		(36.6	)pp		(3.1	)pp		71.6	%		35.0	%		(36.6	)pp
US$ / TRY rate
Closing Rate		32.8262			37.7656			39.7424			21.1	%		5.2	%		32.8262			39.7424			21.1	%
Average Rate		32.3812			36.1936			38.7279			19.6	%		7.0	%		31.5718			37.4607			18.7	%
EUR / TRY rate
Closing Rate		35.1284			40.7019			46.5526			32.5	%		14.4	%		35.1284			46.5526			32.5	%
Average Rate		34.8265			38.0036			43.8612			25.9	%		15.4	%		34.1060			40.9324			20.0	%
US$ / BYN rate
Closing Rate		3.1624			3.1176			2.9663			(6.2	)%		(4.9	)%		3.1624			2.9663			(6.2	)%
Average Rate		3.2221			3.2953			3.0300			(6.0	)%		(8.1	)%		3.2160			3.1627			(1.7	)%

RECONCILIATIONOF NON-GAAP FINANCIAL MEASUREMENTS:

We believe thatAdjusted EBITDA, among other key metrics, facilitates performance comparisons from period to period and aids management decision making.It also enables performance comparisons between companies. As a performance measure, Adjusted EBITDA eliminates potential differencescaused by variations in capital structures (affecting interest expense), tax positions (such as the impact of changes in effective taxrates on periods or companies) and the age and book depreciation of tangible and intangible assets (affecting relative depreciation andamortization expenses). We also present Adjusted EBITDA because we believe it is frequently used by securities analysts, investors andother interested parties in evaluating the performance of other mobile operators in the telecommunications industry in Europe, many ofwhich present Adjusted EBITDA when reporting their results.

Our AdjustedEBITDA definition includes Revenue, Cost of Revenue excluding depreciation and amortization, Selling and Marketing expenses, Administrativeexpenses and Net impairment losses on financial and contract assets, but excludes finance income and expense, other operating incomeand expense, investment activity income and expense, share of profit of equity accounted investees and minority interest.

Nevertheless,Adjusted EBITDA has limitations as an analytical tool, and you should not consider it in isolation from, or as a substitute for, analysisof our results of operations, as reported under IFRS. The following table provides a reconciliation of Adjusted EBITDA, as calculatedusing financial data prepared in accordance with IFRS to net profit, which we believe is the most directly comparable financial measurecalculated and presented in accordance with IFRS.

	Quarter							Half Year
Turkcell Group (million TRY)		Q224		Q225		*y/y%*			H124		H125		*y/y%*
Consolidated profit before minority interest		3,920.5		4,200.5		7.1	%		7,769.5		7,467.8		(3.9	)%
Profit /(loss) from discontinued operations		713.2		(187.4	)	(126.3	)%		1,504.7		(187.4	)	(112.5	)%
Income tax expense		209.4		(1,690.1	)	(907.1	)%		(1,723.7	)	(5,357.6	)	210.8	%
Consolidated profit before income tax & minority interest		2,997.9		6,078.1		102.7	%		7,988.5		13,012.8		62.9	%
Share of loss of equity accounted investees		(1,028.9	)	(1,204.2	)	17.0	%		(1,110.8	)	(2,120.1	)	90.9	%
Finance income		2,122.2		2,891.5		36.3	%		5,522.4		7,085.3		28.3	%
Finance costs		(5,759.9	)	(5,058.9	)	(12.2	)%		(12,800.8	)	(10,648.7	)	(16.8	)%
Monetary gain / (loss)		1,626.2		826.1		(49.2	)%		5,502.3		1,842.6		(66.5	)%
Other income / (expenses)		(283.6	)	(194.5	)	(31.4	)%		(603.3	)	(671.2	)	11.3	%
EBIT		6,321.9		8,817.9		39.5	%		11,478.7		17,524.8		52.7	%
Depreciation and amortization		(13,782.6	)	(14,267.8	)	3.5	%		(27,298.0	)	(27,779.0	)	1.8	%
Adjusted EBITDA		20,104.6		23,085.8		14.8	%		38,776.7		45,303.9		16.8	%

RECONCILIATIONOF ARPU: ARPU is an operational metric and the methodology for calculating performance measuressuch as ARPU varies substantially among operators. It is not standardized across the telecommunications industry; thus, reported performancemeasures vary from those that may result from using a single methodology. Management believes this metric is helpful in assessing thedevelopment of our services over time. The following table shows the reconciliation of Turkcell Türkiye revenues to such revenuesincluded in the ARPU calculations for Q224 and Q225.

Reconciliation of ARPU	Q224			Q225
Turkcell Türkiye Revenue (million TRY)		43,143.2			48,219.8
Telecommunication services revenue		39,554.1			43,553.7
Equipment revenue		2,961.9			4,153.9
Other		627.2			512.2
Revenues not attributed to ARPU calculation¹		(6,838.6	)		(8,640.4	)
Turkcell Türkiye revenues included in ARPU calculation²		35,677.4			39,067.1
Mobile blended ARPU (TRY)		283.6			306.4
Average number of mobile subscribers during the year (million)		38.4			38.4
Fixed residential ARPU (TRY)		350.8			414.7
Average number of fixed residential subscribers during the year (million)		2.9			3.0

(1) Revenuefrom fixed corporate and wholesale business; digital business sales, tower business, and other non-subscriber-based revenues

(2) Revenuesfrom Turkcell Türkiye included in ARPU calculation comprise telecommunication services revenue, equipment revenue, and revenuesnot attributed to ARPU calculation.

ABOUTTURKCELL: Turkcell, headquartered in Türkiye, is a leading technology and telecommunicationscompany offering a diverse portfolio of voice, data, and IPTV services across its mobile and fixed networks, alongside digital consumer,enterprise, and techfin solutions. The Turkcell Group operates in three countries: Türkiye, Belarus, and Northern Cyprus. In Q225,Turkcell Group reported revenue of TRY53.0 billion, with total assets of TRY457.4 billion as of June 30, 2025. Listed on both theNYSE and BIST since July 2000, Turkcell remains the only dual-listed company on these exchanges. Read more at www.turkcell.com.tr.

For furtherinformation, please contact Turkcell

Investor Relations

Tel: + 90 212 313 1888

investor.relations@turkcell.com.tr

Corporate Communications:

Tel: + 90 212 313 2321

Turkcell-Kurumsal-Iletisim@turkcell.com.tr

AppendixA – Tables

Table: NetForeign Exchange Gain and Loss Details

	Quarter									Half Year
Million TRY	Q224			Q225			y/y%			H124			H125			y/y%
Net FX loss before hedging		(1,006.3	)		(84.5	)		(91.6	)%		(4,937.4	)		(1,974.9	)		(60.0	)%
Swap interest income/(expense)		149.6			47.4			(68.3	)%		419.8			178.6			(57.5	)%
Fair value gain on derivative financial instruments		(1,853.3	)		(1,985.0	)		7.1	%		(1,569.4	)		(1,690.2	)		7.7	%
Net FX gain / (loss) after hedging		(2,710.0	)		(2,022.1	)		(25.4	)%		(6,086.9	)		(3,486.4	)		(42.7	)%

Table: IncomeTax Expense Details

	Quarter									Half Year
Million TRY	Q224			Q225			y/y%			H124			H125			y/y%
Current tax expense		(151.2	)		(3,667.4	)		2,325.5	%		(216.7	)		(4,327.6	)		1,897.0	%
Deferred tax income / (expense)		360.6			1,977.2			448.3	%		(1,507.0	)		(1,030.1	)		(31.6	)%
Income tax expense		209.4			(1,690.1	)		(907.1	)%		(1,723.7	)		(5,357.6	)		210.8	%

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE SIXMONTHS PERIOD ENDED 30 JUNE 2025

CONTENT

PAGE

1.	Reporting entity	7
2.	Basis of preparation of financial statements	7
3.	Segment information	12
4.	Revenue	15
5.	Other income and expense	17
6.	Finance income and costs	17
7.	Income tax expense	18
8.	Property, plant and equipment	19
9.	Intangible assets	20
10.	Right-of-use assets	21
11.	Cash and cash equivalents	22
12.	Financial assets	23
13.	Loans and borrowings	24
14.	Derivative financial instruments	27
15.	Financial instruments	33
16.	Guarantees and purchase obligations	36
17.	Commitments and Contingencies	37
18.	Related parties	41
19.	Subsidiaries	45
20.	Investments accounted for using the equity method	46
21.	Discontinued operations	46
22.	Seasonality of operations	47
23.	Subsequent events	47

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

INTERIM CONDENSED CONSOLIDATED STATEMENT OFFINANCIAL POSITION AS OF 30 JUNE 2025

(All amounts are expressed in thousand ofTurkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currenciesother than Turkish Lira are expressed in thousands unless otherwise stated.)

	Notes	30 June 2025		31 December 2024
Assets
Property, plant and equipment	8		128,067,910		122,070,968
Right-of-use assets	10		21,101,130		11,870,256
Intangible assets	9		93,644,943		95,523,701
Investment properties			191,714		218,570
Trade receivables			188,733		382,730
Receivables from financial services			274,878		428,367
Contract assets			266,739		192,517
Financial assets at fair value through other comprehensive income	12		17,116,570		13,828,395
Financial assets at fair value through profit or loss	12		3,304,603		6,955,786
Deferred tax assets			7,563,472		2,961,042
Investments in equity accounted investees	20		4,056,683		6,176,747
Other non-current assets			7,687,797		8,421,151
Total non-current assets			283,465,172		269,030,230

Inventories			731,243		787,095
Trade receivables			21,293,108		19,208,319
Due from related parties	18		479,576		287,635
Receivables from financial services			8,054,076		8,333,255
Contract assets			6,030,248		6,067,567
Derivative financial instruments	14		2,520,570		2,383,779
Financial assets at amortized cost	12		453,282		1,243,626
Financial assets at fair value through other comprehensive income	12		5,603,822		2,615,163
Financial assets at fair value through profit or loss	12		4,408,140		4,169,562
Cash and cash equivalents	11		116,601,097		80,428,396
Other current assets			7,741,353		7,125,271
Total current assets			173,916,515		132,649,668

Total assets			457,381,687		401,679,898

The above interim condensed consolidatedstatement of financial position should be read in conjunction with the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

INTERIM CONDENSED CONSOLIDATED STATEMENT OFFINANCIAL POSITION AS OF 30 JUNE 2025

		30 June			31 December
	Notes	2025			2024
Equity
Share capital			54,468,315			54,468,315
Share premium			48,929			48,929
Treasury shares			(1,523,495	)		(1,549,608	)
Reserves			4,931,535			2,578,642
Remeasurements of defined benefit plan			(3,600,861	)		(3,603,469	)
Retained earnings			165,382,009			166,198,406
Total equity			219,706,432			218,141,215

Liabilities
Borrowings	13		113,421,078			61,178,167
Trade and other payables			384,645			196,968
Due to related parties			16,872			295
Employee benefit obligations			3,742,285			3,537,645
Provisions			2,254,717			2,238,710
Deferred tax liabilities			11,012,273			6,125,084
Contract liabilities			2,359,768			2,511,818
Other non-current liabilities			1,834,929			1,770,381
Total non-current liabilities			135,026,567			77,559,068

Borrowings	13		59,437,001			60,559,715
Current tax liabilities			2,420,755			1,307,573
Trade and other payables			31,430,059			34,619,991
Due to related parties			2,846,738			1,119,948
Deferred revenue			951,690			592,191
Provisions			1,104,825			5,425,755
Contract liabilities			1,909,260			1,776,361
Derivative financial instruments	14		2,548,360			578,081
Total current liabilities			102,648,688			105,979,615
Total liabilities			237,675,255			183,538,683
Total equity and liabilities			457,381,687			401,679,898

The above interim condensed consolidated statementof financial position should be read in conjunction with the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

INTERIM CONDENSED CONSOLIDATED STATEMENT OFPROFIT OR LOSS FOR THE SIX MONTH PERIOD ENDED 30 JUNE 2025

Continuing operations	Notes	6 months period ended at 30 June 2025			3 months period ended at 30 June 2025			6 months period ended at 30 June 2024			3 months period ended at 30 June 2024
Revenue	4		98,431,799			50,295,274			88,172,294			45,021,512
Revenue from financial services	4		5,433,744			2,726,645			4,101,574			2,128,663
Total revenue			103,865,543			53,021,919			92,273,868			47,150,175

Cost of revenue			(71,490,009	)		(36,797,375	)		(68,307,706	)		(34,330,097	)
Cost of revenue from financial services			(3,491,567	)		(1,781,713	)		(2,915,393	)		(1,493,618	)
Total cost of revenue			(74,981,576	)		(38,579,088	)		(71,223,099	)		(35,823,715	)

Gross profit			26,941,790			13,497,899			19,864,588			10,691,415
Gross profit from financial services			1,942,177			944,932			1,186,181			635,045
Total gross profit			28,883,967			14,442,831			21,050,769			11,326,460

Other income	5		58,649			23,663			81,084			6,884
Selling and marketing expenses			(6,749,535	)		(3,341,475	)		(5,621,395	)		(3,047,825	)
Administrative expenses			(4,095,880	)		(1,975,410	)		(3,317,004	)		(1,617,224	)
Net impairment losses on financial and contract assets			(513,715	)		(308,007	)		(633,650	)		(339,478	)
Other expenses	5		(729,827	)		(218,178	)		(684,422	)		(290,512	)
Operating profit			16,853,659			8,623,424			10,875,382			6,038,305

Finance income	6		7,085,337			2,891,521			5,522,375			2,122,162
Finance costs	6		(10,648,702	)		(5,058,870	)		(12,800,817	)		(5,759,888	)
Monetary gain (loss)	6		1,842,565			826,134			5,502,345			1,626,234
Net finance costs / income			(1,720,800	)		(1,341,215	)		(1,776,097	)		(2,011,492	)

Share of loss of equity accounted investees	20		(2,120,064	)		(1,204,156	)		(1,110,756	)		(1,028,912	)
Profit/(loss) before income tax from continuing operations			13,012,795			6,078,053			7,988,529			2,997,901

Income tax expense			(5,357,638	)		(1,690,141	)		(1,723,687	)		209,415
Profit/(loss) for the period from continuing operations			7,655,157			4,387,912			6,264,842			3,207,316

Profit for the period from discontinued operations	21		(187,403	)		(187,403	)		1,504,660			713,167

Profit/ (Loss) for the period			7,467,754			4,200,509			7,769,502			3,920,483

Profit for the year is attributable to:
Owners of the Company			7,467,754			4,200,509			7,779,246			3,922,266
Non-controlling interests			-			-			(9,744	)		(1,783	)
Total			7,467,754			4,200,509			7,769,502			3,920,483
Basic and diluted earnings per share for profit attributable to owners of the Company (in full TL)			3.43			1.93			3.57			1.80
Basic and diluted earnings per share for profit from continuing operations attributable to owners of the Company (in full TL)			3.51			2.01			2.88			1.47
Basic and diluted earnings per share for profit from discontinued operations attributable to owners of the Company (in full TL)			(0.09	)		(0.09	)		0.69			0.33

The above interim condensed consolidated statementof profit or loss should be read in conjunction with the accompanying notes.

TU RKCELL İLETİŞİM HİZMETLERİA.Ş.

CONDENSED CONSOLIDATED STATEMENT OF OTHERCOMPREHENSIVE INCOME FOR THE SIX MONTHS INTERIM PERIOD ENDED 30 JUNE 2025

		6 months			3 months			6 months			3 months
		period ended			period ended			period ended			period ended
		at 30 June			at 30 June			at 30 June			at 30 June
	Notes	2025			2025			2024			2024
Profit/ (loss) for the period			7,467,754			4,200,509			7,769,502			3,920,483
Items that will not be reclassified to profit or loss:
Remeasurements of defined termination benefit			4,654			1,969			24,108			2,567
Income tax relating to remeasurements of defined termination benefit			(2,046	)		(656	)		(1,592	)		(1,007	)
			2,608			1,313			22,516			1,560
Other comprehensive income/(expense):
Items that may be reclassified to profit or loss:
Exchange differences on translation of foreign operations			2,042,870			772,687			(1,200,378	)		(903,208	)
Fair value reserve			(100,900	)		559,814			(11,020	)		(584	)
Cash flow hedges			(1,632,327	)		(707,724	)		(426,215	)		(1,253,197	)
Cost of hedging reserve			952,757			343,227			1,235,993			1,997,727
Loss on hedges of net investments in foreign operations			949,628			224,479			605,251			553,103
Income tax relating to these items			(35,791	)		(98,575	)		304,749			(106,606	)
- Income tax relating to exchange differences			-			-			(24,149	)		(1,312	)
- Income tax relating to cash flow hedges			414,580			183,305			(302,321	)		162,301
- Income tax relating to cost of hedging reserve			(238,189	)		(85,806	)		310,007			(289,093	)
- Income tax relating to fair value reserve			25,225			(139,954	)		10,272			2,700
- Income tax relating to hedges of net investments			(237,407	)		(56,120	)		310,940			18,798
			2,176,237			1,093,908			508,380			287,235
Other comprehensive income for the year, net of income tax			2,178,845			1,095,221			530,896			288,795
Total comprehensive income for the year			9,646,599			5,295,730			8,300,398			4,209,278

Total comprehensive income for the year is attributable to:
Owners of the Company			9,646,599			5,295,730			8,310,142			4,211,061
Non-controlling interests			-			-			(9,744	)		(1,783	)
Total			9,646,599			5,295,730			8,300,398			4,209,278

The above interim condensed consolidated statement of other comprehensiveincome should be read in conjunction with the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

INTERIM CONSOLIDATED STATEMENT OF CHANGES IN EQUITY FOR THE SIXMONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousandof Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currenciesother than Turkish Lira are expressed in thousands unless otherwise stated.)

	Share capital		Treasury shares			Share premium		Legal reserves (*)			Fair value reserve (*)			Hedges of net investments in foreign operations (*)			Hedging reserve (*)			Cost of hedging reserve (*)			Foreign currency translation reserve(*)			Remeasurement of defined benefit plan			Retained earnings			Reserve of disposal group held for sale			Total			Non-controlling interests			Total equity
Balance at 1 January 2024		54,468,315		(1,248,755	)		12,942		41,643,000			(151,629	)		(9,324,434	)		7,117,319			(12,486,388	)		(27,749,985	)		(3,448,433	)		146,754,268			10,343,298			205,929,518			(21,821	)		205,907,697
Profit/ (loss) for the year		-		-			-		-			-			-			-			-			-			-			7,779,246			-			7,779,246			(9,744	)		7,769,502
Other comprehensive income, net of income tax		-		-			-		-			(748	)		916,191			(728,536	)		1,546,000			(1,224,527	)		22,516			-			-			530,896			-			530,896
Total comprehensive income		-		-			-		-			(748	)		916,191			(728,536	)		1,546,000			(1,224,527	)		22,516			7,779,246			-			8,310,142			(9,744	)		8,300,398
Transfers to legal reserves		-		-			-		847,725			-			-			-			-			-			-			(847,725	)		-			-			-			-
Dividend paid		-		70,079			-		-			-			-			-			-			-			-			(8,616,098	)		-			(8,546,019	)		-			(8,546,019	)
Discontinued operations (Note 21)		-		-			-		-			-			-			-			-			1,788,622			-			-			(1,788,622	)		-			-			-
Other		-		-			-		-			-			-			-			-			-			-			-			-			-			4,327			4,327
Balance at 30 June 2024		54,468,315		(1,178,676	)		12,942		42,490,725			(152,377	)		(8,408,243	)		6,388,783			(10,940,388	)		(27,185,890	)		(3,425,917	)		145,069,691			8,554,676			205,693,641			(27,238	)		205,666,403
Balance at 1 January 2025		54,468,315		(1,549,608	)		48,929		40,959,036			(63,310	)		(7,896,306	)		6,659,781			(11,163,949	)		(25,916,610	)		(3,603,469	)		166,198,406			-			218,141,215			-			218,141,215
Profit/ (loss) for the year		-		-			-		-			-			-			-			-			-			-			7,467,754			-			7,467,754			-			7,467,754
Other comprehensive income, net of income tax		-		-			-		-			(75,675	)		712,221			(1,217,747	)		714,568			2,042,870			2,608			-			-			2,178,845			-			2,178,845
Total comprehensive income		-		-			-		-			(75,675	)		712,221			(1,217,747	)		714,568			2,042,870			2,608			7,467,754			-			9,646,599			-			9,646,599
Transfers to legal reserves		-		-			-		799,459			-			-			-			-			-			-			(799,459	)		-			-			-			-
Dividend paid (**)		-		79,121			-		(622,803	)		-			-			-			-			-			-			(7,484,692	)		-			(8,028,374	)		-			(8,028,374	)
Acquisition of treasury shares (-)		-		(53,008	)		-		-			-			-			-			-			-			-			-			-			(53,008	)		-			(53,008	)
Other		-		-			-		-			-			-			-			-			-			-			-			-			-			-			-
Balance at 30 June 2025		54,468,315		(1,523,495	)		48,929		41,135,692			(138,985	)		(7,184,085	)		5,442,034			(10,449,381	)		(23,873,740	)		(3,600,861	)		165,382,009			-			219,706,432			-			219,706,432

(*) Included in Reserves in the consolidated statement of financialposition.

(**) As of 30 June 2025, the first installment of the profitdistribution amounting to TRY 3,659,876 out of the total TRY 8,028,374 was paid on 24 June 2025. The accrued liability related tothe profit distribution has been recorded under other liabilities, and the remaining amount will be paid in December.

The above consolidated statement of changes inequity should be read in conjunction with the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTOF CASH FLOWS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

	Note	30 June 2025			30 June 2024
Cash flows from operating activities:
Profit/(loss) for the year			7,655,157			6,264,842
Discontinued operations	21		(187,403	)		1,504,660
Profit/ (loss) for the period including discontinued operations			7,467,754			7,769,502

Adjustments for:
Depreciation and impairment of property, plant and equipment and investment properties	8		10,467,758			13,935,740
Amortization of intangible assets and right of use assets	9-10		17,311,101			15,358,168
Impairment on property, plant and equipment and intangible asset	8		171			(2,026	)
Net finance expense			1,774,882			4,242,920
Fair value adjustments to derivatives			1,645,184			(1,255,611	)
Income tax expense			5,357,638			2,007,764
Gain on sale of property, plant and equipment			(7,327	)		9,944
Effects of exchange rate changes and inflation adjustments			13,343,936			221,055
Provisions			2,309,891			2,412,022
Share of (profit)/loss of associates and joint ventures	20		2,120,064			1,110,756
Fair value adjustments to financial assets through profit or loss			(373,533	)		(1,298,636	)
Non-cash other adjustments			69,039			72,639
			61,486,558			44,584,237
Change in operating assets/liabilities
Change in trade receivables			(1,842,571	)		(1,659,232	)
Change in due from related parties			(191,476	)		(160,230	)
Change in receivables from financial services			338,134			1,694,123
Change in inventories			55,852			8,015
Change in other current assets			(580,870	)		(392,219	)
Change in other non-current assets			(304,954	)		21,007
Change in due to related parties			283,421			(709,369	)
Change in trade and other payables			(7,351,209	)		(9,021,465	)
Change in other non-current liabilities			83,605			(215,462	)
Change in employee benefit obligations			(180,439	)		(25,374	)
Change in short term contract asset			(74,222	)		(1,350,707	)
Change in long term contract asset			36,784			(101,069	)
Change in deferred revenue			368,653			112,612
Change in short term contract liability			132,899			(312,058	)
Change in long term contract liability			(152,050	)		87,506
Changes in other working capital			(5,018,521	)		(1,938,684	)
Cash generated from operations			47,089,594			30,621,631

Interest paid			(8,024,348	)		(7,773,763	)
Income tax paid			(3,201,363	)		(213,844	)
Net cash inflow from operating activities			35,863,883			22,634,024

Cash flows from investing activities:
Acquisition of property, plant and equipment	8		(16,457,866	)		(15,769,267	)
Acquisition of intangible assets	9		(11,144,023	)		(10,112,430	)
Proceeds from sale of property, plant and equipment			604,350			1,339,144
(Payments for)/proceeds from advances given for acquisition of property, plant and equipment			1,053,778			(2,541,477	)
Cash inflows from sale of shares or borrowing instruments of other enterprises or funds			39,298,469			6,218,264
Cash outflows from purchase of shares or borrowing instruments of other enterprises or funds			(43,862,999	)		(17,644,095	)
Cash (outflows)/inflows from financial assets at amortized cost			1,651,129			10,465,056
Cash (outflows)/inflows financial assets at fair value through profit or loss			-			(6,182,975	)
Interest received			6,979,043			6,432,698
Net cash outflow from investing activities			(21,878,119	)		(27,795,082	)

Cash flows from financing activities:
Proceeds from derivative instruments			3,238,559			3,137,937
Repayments of derivative instruments			(3,630,492	)		(3,664,996	)
Proceeds from issues of loans and borrowings			43,724,028			38,527,595
Proceeds from issues of bonds			43,064,644			9,020,815
Repayments of borrowings			(38,287,090	)		(30,834,243	)
Repayments of bonds			(6,050,010	)		(6,318,762	)
Dividends paid to shareholders			(3,659,876	)		-
Acquisition of treasury shares			(53,008	)		-
Payments of lease liabilities			(3,539,435	)		(3,213,194	)
Net cash outflow from financing activities			34,807,320			6,655,152
Net increase in cash and cash equivalents			48,793,084			1,494,094
Cash and cash equivalents at 1 January			80,101,394			90,669,286
Effects of exchange rate changes on cash and cash equivalents and inflation adjustment			(12,360,186	)		(17,553,405	)
Cash and cash equivalents at 30 June	11		116,534,292			74,609,975

The above interim condensed consolidatedstatement of cash flow should be read in conjunction with the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

Reporting entity

Turkcell Iletisim Hizmetleri AnonimSirketi (the “Company” or “Turkcell”) was incorporated in Turkiye on 5 October 1993 and commenced its operationsin 1994. The address of the Company’s registered office is Maltepe Aydinevler Mahallesi Inonu Caddesi No: 20, Kucukyali Ofispark/Istanbul.

The Company operates under a 25-yearGSM license granted in and effective from April 1998 (2G License), a 20-year 3G license granted in and effective from April 2009and a 13-year 4.5G license granted in August 2016 and effective from April 2016. On 7 April 2023, the 2G License has beenextended to 30 April 2029. As of 30 June 2025, the Company’s shares are listed on Borsa Istanbul A.Ş. (“BIST”)and New York Stock Exchange (“NYSE”).

The interim condensed consolidatedfinancial statements of the Company as at and for the six months ended 30 June 2025 comprise the Company and its subsidiaries (togetherreferred to as the “Group”) and the Group’s interest in an associate.

These interim condensed consolidatedfinancial statements were authorized for issue by the Board of Directors on 13 August 2025.

As of 30 June 2025, the ownershipinterest and voting rights of TVF Bilgi Teknolojileri Iletisim Hizmetleri Yatırım Sanayi ve Ticaret Anonim Sirketi (“TVFBTIH”) and IMTIS Holdings S.a r l. (“IMTIS Holdings”) in the Company are 26.2% and 19.8%, respectively. The proportionof the Company’s shares that are traded in domestic and foreign stock exchanges are 53.95%.

As of 30 June 2025, the Group’simmediate shareholder is TVF BTIH, which is wholly owned by Turkiye Varlik Fonu (“TVF”). TVF has been established with theLaw No. 6741 and published in the Official Gazette dated 26 August 2016.

The Company’s board of directorsconsists of a total of nine non-executive members including three independent members as of 30 June 2025.

Basis of preparation of financial statements

These interim condensed consolidatedfinancial statements for the six months ended 30 June 2025 have been prepared in accordance with IAS 34 Interim Financial Reporting.

These interim condensed consolidatedfinancial statements do not include all the information and disclosures required in the annual financial statements, and should be readin conjunction with the Group’s annual consolidated financial statements as at 31 December 2024.

The accounting policies and presentationare consistent with those of the previous financial year and corresponding interim reporting period.

The financial statements of the Companyand those of the subsidiaries, associates and joint ventures located in Türkiye and Turkish Republic of Northern Cyprus for theyear ended 30 June 2025 were restated for the changes in the general purchasing power of Turkish Lira, which is their functionalcurrency, based on International Accounting Standard No. 29 (“IAS 29”) “Financial Reporting in HyperinflationaryEconomies”. IAS 29 requires that financial statements prepared in the currency of a hyperinflationary economy be stated in termsof the measuring unit current at the balance sheet date and that corresponding figures for previous periods be restated in the same terms.

The table below shows the evolutionof CPI in the last three years and as of 30 June 2025:

	Annual Index	Conversion factor		Cumulative Inflation (last three years)
30 June 2025	3,132.17		1.00000		%220
31 December 2024	2,684.55		1.16674		%291
30 June 2024	2,319.29		1.35049		%324

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

Basis of preparation of financial statements (continued)

New standards and interpretations

The accounting policies adopted inpreparation of the consolidated financial statements as of 30 June 2025 are consistent with those of the previous financial year,except for the adoption of new and amended IFRS and IFRIC interpretations effective as of 1 January 2025 and thereafter. The effectsof these standards and interpretations on the Group’s financial position and performance have been disclosed in the related paragraphs.

The new standards, amendments and interpretations which are effective as of 1 January 2025 are as follows:

Amendments to IAS 21 - Lack of exchangeability

In August 2023, the Board issuedamendments to IAS 21. The amendments specify how an entity should assess whether a currency is exchangeable and how it should determinea spot exchange rate when exchangeability is lacking. When an entity estimates a spot exchange rate because a currency is not exchangeableinto another currency, it discloses information that enables users of its financial statements to understand how the currency not beingexchangeable into the other currency affects, or is expected to affect, the entity’s financial performance, financial positionand cash flows. When applying the amendments, an entity cannot restate comparative information.

The Group expects no significant impacton its balance sheet and equity.

ii)

Standards, amendments and interpretations that are issued but not yet effective:

Standards, interpretations and amendmentsto existing standards that are issued but not yet effective up to the date of issuance of the interim condensed consolidated financialstatements are as follows. The Group will make the necessary changes if not indicated otherwise, which will be affecting the consolidatedfinancial statements and disclosures, when the new standards and interpretations become effective.

Amendments to IFRS 10 and IAS 28- Sale or Contribution of Assets between an Investor and its Associate or Joint Venture

In December 2015, IASB postponedthe effective date of this amendment indefinitely pending the outcome of its research project on the equity method of accounting. Earlyapplication of the amendments is still permitted.

The Group will wait until the finalamendment to assess the impacts of the changes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025unless otherwise stated. Currencies other than Turkish Lira are expressed in thousands unless otherwise stated.)


2.	Basis of preparation of financial statements (continued)

New standards and interpretations (continued)

ii)

Standards, amendments and interpretations that are issuedbut not yet effective: (continued)

Amendments to IFRS 9 and IFRS 7 – Classification and measurement of financial instruments

In May 2024, the Board issuedamendments to the classification and measurement of financial instruments (amendments to IFRS 9 and IFRS 7). The amendment clarifiesthat a financial liability is derecognized on the ‘settlement date’. It also introduces an accounting policy option to derecognizefinancial liabilities that are settled through an electronic payment system before settlement date if certain conditions are met. Theamendment also clarified how to assess the contractual cash flow characteristics of financial assets that include environmental, socialand governance (ESG)-linked features and other similar contingent features as well as the treatment of non-recourse assets and contractuallylinked instruments. Additional disclosures in IFRS 7 for financial assets and liabilities with contractual terms that reference a contingentevent (including those that are ESG-linked), and equity instruments classified at fair value through other comprehensive income are addedwith the amendment. The amendment will be effective for annual periods beginning on or after 1 January 2026. Entities can earlyadopt the amendments that relate to the classification of financial assets plus the related disclosures and apply the other amendmentslater. The new requirements will be applied retrospectively with an adjustment to opening retained earnings.

The Group is in the process of assessingthe impact of the amendments on financial position or performance of the Group.

Annual Improvements to IFRS AccountingStandards – Volume 11

In July 2024, the IASB issuedAnnual Improvements to IFRS Accounting Standards – Volume 11, amending the followings:

IFRS 1 First-time Adoption of International Financial Reporting Standards – Hedge Accounting by a First- time Adopter: These amendments are intended to address potential confusion arising from an inconsistency between the wording in IFRS 1 and the requirements for hedge accounting in IFRS 9.

IFRS 7 Financial Instruments: Disclosures – Gain or Loss on Derecognition: The amendments update the language on unobservable inputs in the Standard and include a cross reference to IFRS 13.

IFRS 9 Financial Instruments – Lessee Derecognition of Lease Liabilities and Transaction Price: IFRS 9 has been amended to clarify that, when a lessee has determined that a lease liability has been extinguished in accordance with IFRS 9, the lessee is required to apply derecognition requirement of IFRS 9 and recognise any resulting gain or loss in profit or loss. IFRS 9 has been also amended to remove the reference to 'transaction price”.

IFRS 10 Consolidated Financial Statements – Determination of a 'De Facto Agent': The amendments are intended to remove the inconsistencies between IFRS 10 paragraphs.

IAS 7 Statement of Cash Flows – Cost Method: The amendments remove the term of “cost method” following the prior deletion of the definition of 'cost method'.

Improvements are effective for annualreporting periods beginning on or after 1 January 2026. Earlier application is permitted for all.

The amendments are not expected tohave a significant impact on the Group’s consolidated financial statements.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025unless otherwise stated. Currencies other than Turkish Lira are expressed in thousands unless otherwise stated.)


2.	Basis of preparation of financial statements (continued)

New standards and interpretations (continued)

ii)	Standards, amendments and interpretations that are issued but not yet effective: (continued)

Amendments to IFRS 9 and IFRS 7 - Contracts ReferencingNature-dependent Electricity

In December 2024, the Board issuedContracts Referencing Nature-dependent Electricity (Amendments to IFRS 9 and IFRS 7). The amendment clarifies the application of the “own use” requirements and permits hedge accounting if these contracts are used as hedging instruments. The amendment alsoadds new disclosure requirements to enable investors to understand the effect of these contracts on a company’s financial performanceand cash flows. The amendment will be effective for annual periods beginning on or after 1 January 2026. Early adoption is permittedbut will need to be disclosed. The clarifications regarding the ‘own use’ requirements must be applied retrospectively, butthe guidance permitting hedge accounting have to be applied prospectively to new hedging relationships designated on or after the dateof initial application.

The Group expects no significant impact on its balance sheetand equity.

IFRS 18 – The new Standard for Presentation andDisclosure in Financial Statements

In April 2024, IASB issuedIFRS 18 which replaces IAS 1. IFRS 18 introduces new requirements on presentation within the statement of profit or loss, including specifiedtotals and subtotals. IFRS 18 requires an entity to classify all income and expenses within its statement of profit or loss into oneof five categories: operating; investing; financing; income taxes; and discontinued operations. It also requires disclosure of management-definedperformance measures and includes new requirements for aggregation and disaggregation of financial information based on the identified ‘roles’ of the primary financial statements and the notes. In addition, there are consequential amendments to other accountingstandards, such as IAS 7, IAS 8 and IAS 34. IFRS 18 and the related amendments are effective for reporting periods beginning onor after 1 January 2027, but earlier application is permitted. IFRS 18 will be applied retrospectively.

The Group is in the process of assessingthe impact of the amendments on financial position or performance of the Group.

IFRS 19 – Subsidiaries withoutPublic Accountability: Disclosures

In May 2024, the Board issuedIFRS 19, which allows eligible entities to elect to apply reduced disclosure requirements while still applying the recognition, measurementand presentation requirements in other IFRS accounting standards. Unless otherwise specified, eligible entities that elect to apply IFRS19 will not need to apply the disclosure requirements in other IFRS accounting standards. An entity that is a subsidiary, does not havepublic accountability and has a parent (either ultimate or intermediate) which prepares consolidated financial statements, availablefor public use, which comply with IFRS accounting standards may elect to apply IFRS 19. IFRS 19 is effective for reporting periods beginningon or after 1 January 2027 and earlier adoption is permitted. If an eligible entity chooses to apply the standard earlier, it isrequired to disclose that fact. An entity is required, during the first period (annual and interim) in which it applies the standard,to align the disclosures in the comparative period with the disclosures included in the current period under IFRS 19.

The standard is not applicable forthe Group.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025unless otherwise stated. Currencies other than Turkish Lira are expressed in thousands unless otherwise stated.)


2.	Basis of preparation of financial statements (continued)

Comparative information and revisionof prior period financial information

The consolidated financial statementsof the Group are prepared comparatively with the previous period in order to enable comparability of the financial position and performancetrends. In order to comply with the presentation of the current period consolidated financial statements, comparative information isreclassified when deemed necessary and significant differences are disclosed. Significant changes in accounting policies and significantaccounting errors are applied retrospectively and prior period financial statements are restated.

The Group had divided its main operatingsegments into three groups: Turkcell Türkiye, Turkcell International, and Techfin, within the framework of a strategy to provideintegrated communication and technology services, ensuring economic integrity. Management has re-evaluated the operating segments anddecided, as of 31 March 2025, to separate the existing operating segments into two groups: Turkcell Türkiye and Techfin. Aftersales of assets in Ukraine, the companies in the Turkcell International segment have been classified to the Other.

The other operations of Turkcell Satış,where consumer electronics sold through digital channels, smart device management operations, and retail channel operations are conducted,was reported under the Other. Since these activities are regularly reviewed by central management through integrated channel management,along with integrated corporate business solutions, city hospitals, hardware, and corporate terminal operations, all operations of TurkcellSatış have been reclassified under the reportable segment of Turkcell Türkiye as of 31 March 2025.

As of 30 June 2024, the presentedcomparative information has been reclassified to ensure consistency with the current period presentation (Note 3). The changes in classificationsdo not affect the operating profit, period profit, and cash flow statement.

At the end of 2024, the Group reassessedthe presentation of the other comprehensive income statement based on the disclosed reasons and concluded that combining the lines showingsimilar nature movements would provide a more appropriate presentation. The Group continued with the same presentation in the comparativefinancial statements as of 30 June 2025, and foreign currency translation differences, cash flow hedge gains/losses, and changesin the time value of options have started to be presented net in the consolidated other comprehensive income statement, including comparativeperiods. Reclassified amounts are disclosed in the related notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025unless otherwise stated. Currencies other than Turkish Lira are expressed in thousands unless otherwise stated.)


3.	Segment information

As part of its strategy to offer integratedcommunication and technology services and to ensure economic integrity, the Group has divided its main operating segments into two groups: “Turkcell Türkiye” and “Techfin.” Although some of these strategic segments provide similar services, theyare affected by different economic conditions and geographical locations. Therefore, they are regularly reviewed by the authority responsiblefor making decisions regarding the Group’s operations, based on resource allocation and performance. The authority responsiblefor making decisions related to the Group's operations is the Board of Directors. However, the Board of Directors may delegate its powersexcluding the non-delegable powers stipulated by law to the CEO and other executives.

Turkcell Türkiye reportable segmentincludes mobile, fixed telecom, digital services and digital business services operations of Turkcell, Turkcell Superonline IletisimHizmetleri A.S. (“Turkcell Superonline”), Turkcell Satış A.S’s (“Turkcell Satış”),Turkcell Dijital Is Servisleri A.S. (“Turkcell Dijital”), group call center operations of Global Bilgi Pazarlama Danismanlikve Cagri Servisi Hizmetleri A.S. (“Turkcell Global Bilgi”), Turktell Bilisim Servisleri A.S. (“Turktell”), AtmoswareTeknoloji Egitim ve Danismanlik A.S (“Atmosware Teknoloji”), Turkcell Teknoloji Arastirma ve Gelistirme A.S. (“TurkcellTeknoloji”), Ultia Teknoloji Yazilim ve Uygulama Gelistirme Ticaret A.S. (“Ultia”), Kule Hizmet ve Isletmecilik A.S.(“Global Tower”), Rehberlik Hizmetleri Servisi A.S. (“Rehberlik”), Turkcell Gayrimenkul Hizmetleri A.S. (“TurkcellGayrimenkul”), Lifecell Dijital Servisler ve Cozumler A.S. (“Lifecell Dijital Servisler”), Lifecell Bulut CozumleriA.S. (“Lifecell Bulut”), Lifecell TV Yayin ve Icerik Hizmetleri A.S. (“Lifecell TV”), Lifecell Müzik Yayinve Iletim A.S. (“Lifecell Müzik”), BiP Iletisim Teknolojileri ve Dijital Servisler A.S. (“BiP A.S.”), TDCVeri Hizmetleri A.Ş (“TDC”) and Artel Bilişim Servisleri A.Ş (“Artel”)

Techfin reportable segment includesall financial services operations of Turkcell Finansman A.Ş (“Turkcell Finansman”), Turkcell Ödeme ve ElektronikPara Hizmetleri A.Ş. (“Turkcell Ödeme”),Paycell LLC(“Paycell LLC”), Paycell Europe GmbH (“PaycellEurope”), Turkcell Sigorta Aracılık Hizmetleri A.Ş. (“Turkcell Sigorta”), Sofra Kurumsal ve ÖdüllendirmeHizmetleri A.Ş (“Sofra”), Turkcell Dijital Teknolojileri Limited (“Turkcell Dijital Teknoloji”), and TurkcellDijital Sigorta A.Ş. (“Turkcell Dijital Sigorta”). The operations of these legal entities aggregated into one reportablesegment as the nature of services are similar and most of them share similar economic characteristics.

Other reportable segment mainly comprisesof non-group call center operations of CJSC Belarusian Telecommunications Network (“BeST”), Kıbrıs Mobile TelekomunikasyonLimited Sirketi (“Kıbrıs Telekom”), East Asian Consortium B.V. (“Eastasia”), Lifecell VenturesB.V (“Lifecell Ventures”), Lifetech LLC (“Lifetech”), Beltower LLC (“Beltower”), Lifecell DigitalLimited (“Lifecell Digital”), Yaani Digital BV (“Yaani”), BiP Digital Communication Technologies B.V (“BiPB.V.”), Turkcell Global Bilgi non Group call center activities, Turkcell Enerji Çözümleri ve Elektrik SatışTicaret A.Ş. (“Turkcell Enerji”), Boyut Grup Enerji Elektrik Üretim ve İnşaat Sanayi ve Ticaret A.Ş.(“Boyut Enerji”) and Turkcell Yeni Teknolojiler Girişim Sermayesi Yatırım Fonu (“Turkcell GSYF”).

The Board primarily uses adjusted EBITDAto assess the performance of the operating segments. Adjusted EBITDA definition includes revenue, selling and marketing expenses, administrativeexpenses cost of revenue excluding depreciation and amortization.

Adjusted EBITDA is not a financialmeasure defined by IFRS as a measurement of financial performance and may not be comparable to other similarly-titled indicators usedby other companies. Reconciliation of Adjusted EBITDA to the consolidated profit for the year is included in the accompanying notes.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025unless otherwise stated. Currencies other than Turkish Lira are expressed in thousands unless otherwise stated.)

3.	Segment information (continued)

	Six months ended 30 June
	Turkcell Turkiye						Techfin						Other						Intersegment Eliminations						Consolidated
	2025			2024			2025			2024			2025			2024			2025			2024			2025		2024
Total segment revenue		94,357,516			84,469,260			5,827,804			4,584,248			6,424,048			4,929,805			(2,743,825	)		(1,709,445	)		103,865,543		92,273,868
Inter-segment revenue		(524,804	)		(619,289	)		(394,060	)		(482,675	)		(1,824,961	)		(607,481	)		2,743,825			1,709,445			-		-
Revenues from external customers		93,832,712			83,849,971			5,433,744			4,101,573			4,599,087			4,322,324			-			-			103,865,543		92,273,868
Adjusted EBITDA		42,864,820			37,028,385			1,494,372			1,135,085			1,132,230			818,637			(187,555	)		(205,359	)		45,303,867		38,776,748

	Three months ended 30 June
	Turkcell Turkiye						Techfin						Other						Intersegment Eliminations						Consolidated
	2025			2024			2025			2024			2025			2024			2025			2024			2025		2024
Total segment revenue		48,219,811			43,143,215			2,916,258			2,369,411			3,299,684			2,465,854			(1,413,834	)		(828,305	)		53,021,919		47,150,175
Inter-segment revenue		(241,267	)		(284,463	)		(189,613	)		(240,749	)		(982,954	)		(303,093	)		1,413,834			828,305			-		-
Revenues from external customers		47,978,544			42,858,752			2,726,645			2,128,662			2,316,730			2,162,761			-			-			53,021,919		47,150,175
Adjusted EBITDA		21,838,342			19,220,283			734,450			629,568			497,075			307,921			15,918			(53,215	)		23,085,785		20,104,557

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTESTO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousandof Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currenciesother than Turkish Lira are expressed in thousands unless otherwise stated.)

3.	Segment information (continued) Reconciliation fo Adjusted EBITDA

	6 months period ended at 30 June 2025			3 months period ended at 30 June 2025			6 months period ended at 30 June 2024			3 months period ended at 30 June 2024
Profit/ (Loss) for the period		7,655,157			4,387,912			6,264,842			3,207,316
Add/(Less):
Income tax expense		5,357,638			1,690,141			1,723,687			(209,415	)
Finance income		(7,085,337	)		(2,891,521	)		(5,522,375	)		(2,122,162	)
Finance costs		10,648,702			5,058,870			12,800,817			5,759,888
Other income		(58,649	)		(23,663	)		(81,084	)		(6,884	)
Other expenses		729,827			218,178			684,422			290,512
Monetary (gain) loss		(1,842,565	)		(826,134	)		(5,502,345	)		(1,626,234	)
Depreciation and amortization		27,779,030			14,267,846			27,298,028			13,782,624
Share of gain of equity accounted investees		2,120,064			1,204,156			1,110,756			1,028,912
Consolidated adjusted EBITDA		45,303,867			23,085,785			38,776,748			20,104,557

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTESTO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousandof Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currenciesother than Turkish Lira are expressed in thousands unless otherwise stated.)

4.	Revenue

	Six months ended 30 June
	Turkcell Turkiye				Techfin				Other				Intersegment Eliminations						Consolidated
	2025		2024		2025		2024		2025		2024		2025			2024			2025		2024
Telecommunication services		85,834,819		76,379,048		-		-		2,418,061		2,125,521		(82,866	)		(154,402	)		88,170,014		78,350,167
Equipment related revenues		7,501,806		6,800,015		-		-		152,441		138,451		(11,115	)		(8,757	)		7,643,132		6,929,709
Revenue from financial services		-		-		5,827,804		4,584,248		-		-		(394,060	)		(482,674	)		5,433,744		4,101,574
Other		1,020,891		1,290,197		-		-		3,853,546		2,665,833		(2,255,784	)		(1,063,612	)		2,618,653		2,892,418
Total		94,357,516		84,469,260		5,827,804		4,584,248		6,424,048		4,929,805		(2,743,825	)		(1,709,445	)		103,865,543		92,273,868

	Three months ended 30 June
	Turkcell Turkiye				Techfin				Other				Intersegment Eliminations						Consolidated
	2025		2024		2025		2024		2025		2024		2025			2024			2025		2024
Telecommunication services		43,553,680		39,554,063		-		-		1,257,434		1,060,617		(38,855	)		(74,288	)		44,772,259		40,540,392
Equipment revenues		4,153,905		2,961,928		-		-		79,234		85,037		(5,120	)		(240	)		4,228,019		3,046,725
Revenue from financial services		-		-		2,916,258		2,369,411		-		-		(189,613	)		(240,748	)		2,726,645		2,128,663
Other		512,226		627,224		-		-		1,963,016		1,320,200		(1,180,246	)		(513,029	)		1,294,996		1,434,395
Total		48,219,811		43,143,215		2,916,258		2,369,411		3,299,684		2,465,854		(1,413,834	)		(828,305	)		53,021,919		47,150,175

Revenue from financial services comprise of interest incomegenerated from consumer financing activities, The Group has interest income amounting to TRY 2,450,422 (2024: TRY 2,301,555) and TRY1,219,510 (2024: TRY 1,171,772) as of 6 months and 3 months period ended at 30 June 2025 respectively.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

4.	Revenue(continued)

	30 June 2025
	Turkcell Turkiye		Techfin		Other		Intersegment eliminations			Consolidated
Telecommunication Services		85,834,819		-		2,418,061		(82,866	)		88,170,014
At a point in time		656,253		-		3,381		-			659,634
Over time		85,178,566		-		2,414,680		(82,866	)		87,510,380
Equipment Related		7,501,806		-		152,441		(11,115	)		7,643,132
At a point in time		7,146,674		-		152,441		(11,115	)		7,288,000
Over time		355,132		-		-		-			355,132
Revenue from financial operations		-		5,827,804		-		(394,060	)		5,433,744
At a point in time		-		3,326,934		-		(374,978	)		2,951,956
Over time		-		2,500,870		-		(19,082	)		2,481,788
Other		1,020,891		-		3,853,546		(2,255,784	)		2,618,653
At a point in time		165,266		-		2,632		-			167,898
Over time		855,625		-		3,850,914		(2,255,784	)		2,450,755
Total		94,357,516		5,827,804		6,424,048		(2,743,825	)		103,865,543
At a point in time		7,968,193		3,326,934		158,454		(386,093	)		11,067,488
Over time		86,389,323		2,500,870		6,265,594		(2,357,732	)		92,798,055

	30 June 2024
	Turkcell Turkiye		Techfin		Other		Intersegment eliminations			Consolidated
Telecommunication Services		76,379,048		-		2,125,521		(154,402	)		78,350,167
At a point in time		2,020,826		-		3,575		-			2,024,401
Over time		74,358,222		-		2,121,946		(154,402	)		76,325,766
Equipment Related		6,800,015		-		138,451		(8,757	)		6,929,709
At a point in time		6,601,542		-		138,451		(8,757	)		6,731,236
Over time		198,473		-		-		-			198,473
Revenue from financial operations		-		4,584,248		-		(482,674	)		4,101,574
At a point in time		-		2,217,650		-		(435,520	)		1,782,130
Over time		-		2,366,598		-		(47,154	)		2,319,444
Other		1,290,197		-		2,665,833		(1,063,612	)		2,892,418
At a point in time		216,944		-		40,669		(5,333	)		252,280
Over time		1,073,253		-		2,625,164		(1,058,279	)		2,640,138
Total		84,469,260		4,584,248		4,929,805		(1,709,445	)		92,273,868
At a point in time		8,839,312		2,217,650		182,695		(449,610	)		10,790,047
Over time		75,629,948		2,366,598		4,747,110		(1,259,835	)		81,483,821

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

5.	Other income and expense

Recognized in the statement of profitor loss:

	6 months period ended at 30 June 2025			3 months period ended at 30 June 2025			6 months period ended at 30 June 2024			3 months period ended at 30 June 2024
Depositary reimbursement		-			-			1,467			723
Gain on sale of fixed assets		7,327			7,327			-			(32,891	)
Rent income		7,661			3,935			8,928			(4,399	)
Other		43,661			12,401			70,689			43,451
Other income		58,649			23,663			81,084			6,884
Donation expenses		(331,236	)		(103,939	)		(404,834	)		(119,403	)
Loss on modification of lease contract		(84,139	)		(37,629	)		(89,051	)		(46,506	)
Litigation expenses		(135,937	)		(35,768	)		(70,939	)		(59,387	)
Loss on sale of fixed assets		-			7,319			(11,312	)		(11,312	)
Restructuring cost		(13,460	)		(13,460	)		(25,740	)		(4,609	)
Other		(165,055	)		(34,701	)		(82,546	)		(49,295	)
Other expense		(729,827	)		(218,178	)		(684,422	)		(290,512	)

6.	Financeincome and costs

Recognized in the statement of profit or loss:

	6 months period ended at 30 June 2025			3 months period ended at 30 June 2025			6 months period ended at 30 June 2024			3 months period ended at 30 June 2024
Interest income		4,502,049			2,022,483			3,847,786			2,192,559
Income from financial assets carried at fair value		373,533			60,698			1,298,636			283,258
Cash flow hedges – reclassified to profit or loss		-			(61,462	)		-			(5,172,583	)
Net fair value gains on derivative financial instruments and interest		-			(364,616	)		-			4,618,463
Other		2,209,755			1,234,418			375,953			200,465
Finance income		7,085,337			2,891,521			5,522,375			2,122,162
Net foreign exchange losses		(1,974,880	)		(84,488	)		(4,937,364	)		(1,006,326	)
Net interest expenses for financial assets and liabilities measured at amortized cost		(7,077,103	)		(3,415,707	)		(6,665,587	)		(3,585,559	)
Net fair value losses on derivative financial instruments and interest		(1,627,025	)		(1,627,025	)		(4,790,446	)		(4,790,446	)
Cash flow hedges – reclassified to profit or loss		115,508			115,508			3,640,918			3,640,918
Other		(85,202	)		(47,158	)		(48,338	)		(18,475	)
Finance costs		(10,648,702	)		(5,058,870	)		(12,800,817	)		(5,759,888	)
Monetary gain (loss)		1,842,565			826,134			5,502,345			1,626,234
Net finance costs		(1,720,800	)		(1,341,215	)		(1,776,097	)		(2,011,492	)

(*) As of 30 June 2025, the Grouphas a cash flow hedge gain of TRY 115,508 recognized in the statement of profit or loss (30 June 2024: TRY 4,338,250). As of 30June 2025, there is no reclassification adjustment related to hedge losses on the time value of options (30 June 2024: TRY(697,331)).

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

7.	Income tax expense

The corporate tax rate in Türkiyeis 25% for companies (30 June 2024: 25%), 30% for banks (30 June 2024: 30%), and companies within the scope of Law No. 6361,electronic payment and money institutions, authorized foreign exchange institutions, asset management companies, capital market institutions,insurance and reinsurance companies and pension companies.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

8.	Property, plant and equipment

											Impairment			Effects of
	Balance at 1										expenses/			movements in			Balance at
Cost	January 2025		Additions		Disposals			Transfers			(reversals)			exchange rates			30 June 2025
Network infrastructure (All operational)		320,644,866		2,807,582		(1,698,465	)		7,160,065			-			820,435			329,734,483
Land and buildings		24,430,889		475,379		(2,534	)		3,118,196			-			(106,279	)		27,915,651
Equipment, fixtures and fittings		21,081,557		1,390,366		(152,546	)		27,197			-			(324,823	)		22,021,751
Motor vehicles		297,158		47		(5,930	)		-			-			3,343			294,618
Leasehold improvements		6,485,992		47,444		(152	)		-			-			(315	)		6,532,969
Electricity production power plant		576,611		-		-			-			-			-			576,611
Construction in progress		5,853,024		11,758,206		(115,054	)		(10,305,458	)		-			71,601			7,262,319
Total		379,370,097		16,479,024		(1,974,681	)		-			-			463,962			394,338,402
Accumulated depreciation
Network infrastructure (All operational)		224,083,611		8,955,140		(1,405,693	)		-			171			1,239,741			232,872,970
Land and buildings		5,574,291		584,334		-			-			-			(42,386	)		6,116,239
Equipment, fixtures and fittings		21,046,360		843,350		(47,434	)		-			-			(1,207,647	)		20,634,629
Motor vehicles		254,398		9,566		(5,845	)		-			-			3,241			261,360
Leasehold improvements		6,242,338		40,086		-			-			-			(3,687	)		6,278,737
Electricity production power plant		98,131		8,426		-			-			-			-			106,557
Total		257,299,129		10,440,902		(1,458,972	)		-			171			(10,738	)		266,270,492

Net book value		122,070,968		6,038,122		(515,709	)		-			(171	)		474,700			128,067,910

Depreciation expense for the six months ended 30 June 2025amounting to TRY 10,441,073 including impairment losses are recognized in cost of revenue.

Impaired network infrastructure mainly consists of damagedor technologically inadequate mobile and fixed network infrastructure investments. Impairment losses on property, plant and equipmentfor the six months period ended 30 June 2025 is TRY 171 and are recognized within depreciation expenses.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

9.	Intangibleassets

Cost	1 January 2025		Additions			Disposals			Transfers			Effects of movements in exchange rates			30 June 2025
Telecommunication licenses		115,009,392		212,407			-			-			(13,650	)		115,208,149
Computer software		188,307,934		6,138,349			(113,501	)		209,051			1,199,637			195,741,470
Transmission line software		1,795,146		404			-			-			6,446			1,801,996
Indefeasible right of usage		1,840,006		1,086			(832,589	)		-			-			1,008,503
Brand name		14,170		-			-			-			1,213			15,383
Customer base		57,965		-			-			-			(2,542	)		55,423
Goodwill (*)		687,166		-			-			-			-			687,166
Subscriber acquisition cost		73,882,568		4,462,438			-			-			428,870			78,773,876
Electricity production license		1,016,349		-			-			-			-			1,016,349
Others		2,465,863		122,687			-			-			(15,812	)		2,572,738
Construction in progress		424,714		206,652			-			(209,051	)		1,011			423,326
Total		385,501,273		11,144,023			(946,090	)		-			1,605,173			397,304,379
Accumulated amortization
Telecommunication licenses		87,810,879		3,307,650			-			-			652,741			91,771,270
Computer software		145,504,923		5,695,851			(21,560	)		-			(139,736	)		151,039,478
Transmission line software		1,810,734		37			-			-			(10,202	)		1,800,569
Indefeasible right of usage		1,167,064		20,712			(832,589	)		-			581			355,768
Brand name		3,238		-			-			-			6,634			9,872
Customer base		30,315		218			-			-			8,953			39,486
Subscriber acquisition cost		51,825,953		4,700,249			-			-			63,165			56,589,367
Electricity production license		160,271		14,873			-			-			18,041			193,185
Others		1,664,195		69,868			-			-			126,378			1,860,441
Total		289,977,572		13,809,458			(854,149	)		-			726,555			303,659,436

Net book value		95,523,701		(2,665,435	)		(91,941	)		-			878,618			93,644,943

Amortization expenses for the six months ended 30 June 2025amounting to TRY 13,809,458 include impairment losses and are recognized in cost of revenue.

Computer software includes capitalized software developmentcosts that meet the definition of an intangible asset. The amount of computer software within the Group is TRY 1,804,136 for the sixmonths interim period ending 30 June 2025.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

10.      Right-of-use assets

Closing balances of right of use assets as of 30 June 2025and depreciation and amortization expenses for the related period is stated as below:

	Site Rent			Building			Network equipment			Vehicles			Right of way			License			Other			Total
Balance at 1 January 2025		6,085,944			2,205,960			293,199			1,844,350			837,751			33,516			569,536			11,870,256
Depreciation and amortization charge for the year		(1,388,119	)		(323,168	)		(650,854	)		(310,043	)		(523,969	)		(72,264	)		(233,226	)		(3,501,643	)
Balance at 30 June 2025		6,219,232			2,446,442			911,332			1,681,070			9,178,123			69,907			595,024			21,101,130

As at 30 June 2025, the Company has additions to right-of-useassets amounting to TRY 12,958,456 and interest expense on lease liabilities amounting to TRY 1,246,362. Depreciation and amortizationexpenses amounting to TRY 3,501,643 are recognized in cost of revenues.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

11.      Cash and cash equivalents

	30 June 2025			31 December 2024
Cash in hand		407			579
Banks		111,566,873			74,287,514
- Demand deposits		5,460,184			5,374,208
- Time deposits		45,362,832			54,476,115
- Receivables from reverse repo		60,743,857			14,437,191
Impairment loss provision		(13,640	)		(11,422	)
Other (*)		5,047,457			6,151,725
		116,601,097			80,428,396

(*) It consists of US Treasury Bills and money market fundswith a maturity of less than 90 days.

As of 30 June 2025, the average effective interestrates of TRY, USD, EUR and RMB time deposits are 47.3%, 3.3%, 2.4% and 0.3% (31 December 2024: 47.4%, 2.7%, 2.7% and 0.3%) respectively.

As of 30 June 2025, average maturity of time depositsis 31 days (31 December 2024: 35 days). Reconciliation of cash and cash equivalents in consolidated statement of cash flows:

	30 June 2025			30 June 2024
Cash and cash equivalents		116,601,097			67,780,172
Interest accrual of cash and cash equivalents		(66,805	)		(376,805	)
Asset held for sale		-			7,206,608
Total		116,534,292			74,609,975

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

12.      Financial assets

The details of financial assets as of 30 June 2025and 31 December 2024 are as follows:

	30June 2025				31 December 2024
	Non- current		Current		Non- current		Current
Fair value through profit or loss		3,304,603		4,408,140		6,955,786		4,169,562
- Currency protected time deposits		-		-		-		4,169,562
- Investment funds (*)		3,304,603		2,333,063		6,955,786		-
- Gold deposits		-		2,075,077		-		-
Fair value through other comprehensive income		17,116,570		5,603,822		13,828,395		2,615,163
- Listed debt securities (**)		17,116,570		5,603,822		13,828,395		2,615,163
Amortized cost		-		453,282		-		1,243,626
- Time deposits with maturity of more than three months		-		453,282		-		1,243,626
		20,421,173		10,465,244		20,784,181		8,028,351

(*) Investment funds mainly consistof free market funds and Turkcell Venture Capital Investment Fund (GSYF), established by Re-Pie Portfolio Management Inc., as well asthe shares and financial assets related to this fund. These funds are measured at fair value, and the corresponding changes in valueare recognized in profit or loss.

(**) Listed debt securitiesare classified as financial assets at fair value through other comprehensive income.

	Fair Values
	30 June 2025	31 December 2024	Fair value hierarchy	Valuation technique
Financial assets at fair value through other comprehensive income	22,720,392	16,443,558	Level 1	Pricing models based on quoted market prices at the end of the reporting period,
Financial assets at fair value through profit or loss	7,054,568	6,332,478	Level 1	Pricing models based on quoted market prices at the end of the reporting period,
Financial assets at fair value through profit or loss	-	4,169,562	Level 2	Forward exchange rates at the reporting date
Financial assets at fair value through profit or loss	658,175	623,308	Level 3	Pricing models based on discounted cash flow
	30,433,135	27,568,906

The movement of the financial assets which is shown in Level 3 are as follows:

	2025		2024
Opening balance		623,308		713,527
Addition		34,867		49,868
Closing balance		658,175		763,395

During the year, the following gains(losses) were recognized in other comprehensive income.

	6 months period ended at			3 months period ended at 30			6 months period ended at			3 months period ended at
	30 June 2025			June 2025			30 June 2025			30 June 2025
Gains / (Losses) recognized in other comprehensive income
Related to financial assets		(100,900	)		559,814			(11,020	)		(584	)
Related to financial assets, tax effect		25,225			(139,954	)		10,272			2,700
		(75,675	)		419,860			(748	)		2,116

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

13.      Loans and borrowings

	30 June		31 December
Long-term borrowings	2025		2024
Unsecured bank loans		34,666,277		29,863,222
Secured bank loans		10,625,587		7,700,857
Lease liabilities		11,521,661		4,407,511
Debt securities issued		56,607,553		19,206,577
		113,421,078		61,178,167

	30 June		31 December
Short-term borrowings	2025		2024
Unsecured bank loans		29,583,021		33,814,536
Secured bank loans		1,567,160		1,426,049
Lease liabilities		2,798,511		1,219,118
Debt securities issued		25,488,309		24,100,012
		59,437,001		60,559,715

The sale process of the conventionalbond issuance of the Company with a nominal amount of USD 500,000, 5-year maturity, a redemption date of 24 January 2030, a fixedannual coupon rate of 7.45%, and a sales price of 100% of the nominal value, to qualified investors abroad was completed on 24 January 2025.The subscription agreement for the issuance was signed on 22 January 2025.

The sale process of the sustainablebond issuance of the Company with a nominal amount of USD 500,000, 7-year maturity, a redemption date of 24 January 2032, a fixedannual coupon rate of 7.65%, and a sales price of 100% of the nominal value, to qualified investors abroad was completed on 24 January 2025.The subscription agreement for the issuance was signed on 22 January 2025.

Within the scope of the issue limitof TRY 8,000,000 approved by the Capital Markets Board;the book building of the financing bond issuance of the Company with a maturitydate of 13 August 2025, an annual simple interest of 49.75% with a nominal amount of TRY 900,000 to qualified investors within Türkiye,withouta public placement was completed, and the securities were transferred to the investor accounts on 9 May 2025.

Within the scope of the issue limitof TRY 8,000,000 approved by the Capital Markets Board; the book building of the financing bond issuance of the Company with a maturitydate of 2 July 2025, an annual simple interest of 46.00% with a nominal amount of TRY 230,000 to qualified investors within Türkiye,without a public placement was completed, and the securities were transferred to the investor accounts on 27 March 2025.

The Company has used a loan in accordancewith the loan agreement previously signed with Development Investment Bank of Türkiye on 23 September 2024, under this agreement,the Company has used EUR 18,500 loan on 5 February 2025 with an interest rate of 6M Euribor+2%.

The Company has used a loan in accordancewith the loan agreement previously signed with China Development Bank on 30 September 2024, under this agreement, the Company hasused RMB 103,000 loan on March 13, 2025 with an interest rate of 4.01%. The Company has used RMB 196,000 loan on 16 May 2025with an interest rate of 4.01%. The Company has used RMB 142,000 loan on 20 June 2025 with an interest rate of 4.01%.

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

13.      Loans and borrowings (continued)

The Company has used a loan in accordancewith the loan agreement previously signed with HSBC Bank Middle East Limited and AB Svensk Exportkredit under the insurance of the SwedishExport Credit Agency (“EKN”) on 25 July 2024, under this agreement, the Company has used EUR 33,167 loan on 28 March 2025with an interest rate of 6M Euribor+0.67%.

In accordance with the loan agreementsigned with Dubai Islamic Bank on 12 May 2025, the Company received a Murabaha financing facility amounting to USD 150,000 on 13May 2025, with a maturity of five years.

The Company has used a loan in accordancewith the general loan agreement previously signed with Citibank A.Ş.; under this agreement, the Company has used a TRY 500,000loan on June 4, 2025, with an interest rate of 46%, maturing on 4 August 2025.

Turkcell Superonline obtained approvalfrom the CMB on 21 December 2023, for the issuance of Sukuk up to 3,000,000 TRY. In the fourth quarter of 2024, two Sukuk, eachworth TRY 300,000, were issued in November and December 2024, with maturities in April and May 2025, respectively.The payments for these issuances have been made on their respective maturity dates. As the validity period of the CMB approval expiredon 22 December 2024, no further issuances were made under this approval during the second quarter of 2025. On 26 June 2025,our Company submitted an application to the Capital Markets Board of Turkey for an issuance limit approval in the amount of TRY 3 billionfor the issuance of Sukuk.

In the second quarter of 2025, on 26June 2025, Turkcell Ödeme issued a lease certificate with a nominal value of TRY 350,000, maturing on 26 September 2025.Earlier in the year, on 26 March 2025, a lease certificate worth TRY 300,000 was issued, which matured on 26 June 2025. Asof 30 June 2025, the remaining issuance limit stands at TRY 150,000.

Turkcell Finansman issued a total TRY300,000 Sukuk Certificates on 8 May 2025, with a maturity date of 7 August 2025, and total TRY 500,000 Sukuk Certificates on25 June 2025, with a maturity date of 18 September 2025, following the approval from the CMB on 23 January 2025. On 23January 2025, the CMB had granted approval for a total of TRY 1,500,000., issuance limit remained from this TRY 200,000 limit whichwas taken on 6 January 2025.

TDC secured a murabaha financing facilityamounting to EUR 100,000 with a final maturity of five years on 26 May 2025, pursuant to the loan agreement executed with EmiratesNBD Bank on 16 May 2025.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTSFOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Liraand are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other thanTurkish Lira are expressed in thousands unless otherwise stated.)

13.

Loansand borrowings (continued)

Terms and conditions of outstanding loans are as follows:

			30 June 2025			31 December 2024
	Currency	Interest rate type	Payment period	Nominal interest rate	Carrying amount	Payment period	Nominal interest rate	Carrying amount
Unsecured Bank Loans	EUR	Floating	2025-2030	Euribor+2.0%-Euribor+4.0%	39,902,331	2025-2030	Euribor+2%-Euribor+4.0%	37,279,617
Unsecured Bank Loans	TRY	Fixed	2025-2027	40.5%-53.0%	10,014,951	2025-2027	24.4%-67.3%	16,823,283
Unsecured Bank Loans	TRY	Floating	2025-2027	TLREF+2.0%	242,975	-	-	-
Unsecured Bank Loans	USD	Floating	2025-2030	Sofr+ 2.0%-Sofr+ 2.2%	10,691,262	2026-2029	Sofr+ 2.2%	5,963,955
Unsecured Bank Loans	RMB	Fixed	2025-2028	5.2%-5.5%	2,791,715	2026-2028	5.2%-5.5%	2,998,676
Unsecured Bank Loans	EUR	Fixed	2025	5.0%	480,656	2025	5%	431,850
Unsecured Bank Loans	USD	Fixed	2025-2026	2.6%	125,408	2026	2.6%	180,377
Secured bank loans	USD	Fixed	2025-2034	1.5%-3.8%	4,329,250	2029-2033	1.5%-3.8%	4,833,314
Secured bank loans	USD	Floating	2025-2028	Sofr+0.6% & Sofr+1.6%	763,541	2026-2028	Sofr+0.6% & Sofr+1.6%	919,927
Secured bank loans	EUR	Floating	2025-2037	Euribor+0.7%	2,760,617	2036	Euribor+0.7%	1,312,607
Secured bank loans	RMB	Fixed	2025-2034	4.0%	4,339,339	2034	4.0%	2,061,058
Debt securities issued	USD	Fixed	2025-2031	5.8%-7.7%	79,475,414	2025-2028	5.8%	39,802,221
Debt securities issued	TRY	Fixed	2025	39.5%-49.7%	2,620,448	2025	42.0%-49.5%	3,504,368
Lease liabilities	TRY	Fixed	2025-2070	2.0%-62.3%	5,183,066	2025-2069	7.5%-62.3%	4,620,071
Lease liabilities	GBP	Fixed	2025	2.7%-5.9%	61	2025	2.7%-5.9%	71
Lease liabilities	EUR	Fixed	2025-2034	2.9%-10.3%	431,492	2025-2034	2.9%-10.3%	408,785
Lease liabilities	BYN	Fixed	2025-2028	10.8%-20.0%	677,001	2025-2028	10.8%-20.0%	542,353
Lease liabilities	USD	Fixed	2025-2052	4.0%-11.6%	8,028,552	2025-2037	4.0 %-11.6%	55,349
					172,858,079			121,737,882

TURKCELL İLETİŞİMHİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATEDFINANCIAL STATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousandof Turkish Lira and are expressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currenciesother than Turkish Lira are expressed in thousands unless otherwise stated.)

14.

Derivative financial instruments

The fair value of derivative financialinstruments at 30 June 2025 and 31 December 2024 are attributable to the following:

	30 June 2025					31 December 2024
	Assets		Liabilities			Assets		Liabilities
Held for trading		2,503,983		(2,552,313	)		2,291,854		(584,913	)
Net interest accrual income/ expense		16,587		3,953			91,925		6,832
		2,520,570		(2,548,360	)		2,383,779		(578,081	)

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

14.

Derivative financial instruments (continued)

Held for trading

The notional amount and the fair value of derivatives usedheld for trading contracts at 30 June 2025 and 31 December 2024 are as follows:

	30 June 2025
	Sell			Buy
		Notional			Notional
	Currency	amount		Currency	amount		Fair value		Maturity
Cross currency swap contracts	TRY		15,460	USD		2,000		64,985	November 2025
	TRY		32,581	RMB		50,419		234,942	April 2026
Currency Forward Contracts	USD		161,000	TRY		7,666,590		267,445	July 2025 - April 2026
	TRY		3,651,600	USD		76,000		24,822	February 2026 - March 2026
	EUR		10,000	USD		534,373		10,285	November 2025
Currency Swap	EUR		25,000	USD		29,262		944	July 2025
	USD		44,595	RMB		321,336		13,743	July 2025
Participating cross currency swap contracts	TRY		525,282	EUR		94,208		777,651	April 2026
	TRY		393,753	USD		66,748		369,664	November 2025 - April 2033
Interest swap contracts	USD		835,972	USD		835,972		739,502	July 2025 - January 2032
								2,503,983

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

14.

Derivative financial instruments (continued)

Held for trading

	30 June 2025
	Sell			Buy
		Notional			Notional
	Currency	amount		Currency	amount		Fair value			Maturity
Cross currency swap contracts	EUR		86,021	USD		100,000		(16,002	)	January 2032
Currency Forward Contracts	USD		60,000	TRY		2,895,290		(11,858	)	February 2026 - March 2026
	TRY		31,938,480	USD		759,000		(592,138	)	July 2025 - April 2026
Currency Swap	EUR		33,301	RMB		270,000		(53,406	)	July 2025
	EUR		1,255,665	USD		1,427,340		(1,716,688	)	July 2025 - August 2025
Participating cross currency swap contracts	TRY		55,391	EUR		12,048		(124,624	)	April 2026
Options contracts	TRY		500,000	EUR		10,000		(8,392	)	November 2025
	TRY		470,000	USD		10,000		(29,205	)	December 2025
	XAU		6	USD		20,000		-		July 2025
								(2,552,313	)

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

14.

Derivative financial instruments (continued)

Held for trading (continued)

31 December 2024

Sell

Buy

Notional

Currency

amount

Currency

amount

Fair value

Maturity

Cross currency swap contracts

TRY

30,920

USD

4,000

132,592

November 2025

TRY

43,386

RMB

67,141

319,624

April 2026

Currency Forward Contracts

USD

107,500

TRY

5,101,275

331,196

February 2025 - December 2025

EUR

10,000

TRY

534,373

40,247

November 2025

Currency Swap

EUR

22,343

RMB

170,006

37,566

February 2025

Participating cross currency swap contracts

TRY

756,826

EUR

136,499

779,353

October 2025 - April 2026

TRY

547,821

USD

91,894

565,131

November 2025 - April 2026

Interest swap contracts

USD

82,171

USD

82,171

86,145

April 2026 - April 2033

2,291,854

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS FORTHE SIX MONTHS PERIOD ENDED 30 JUNE 2025

(All amounts are expressed in thousand of Turkish Lira and areexpressed in terms of purchasing power of Turkish Lira as of 30 June 2025 unless otherwise stated. Currencies other than TurkishLira are expressed in thousands unless otherwise stated.)

14.

Derivative financial instruments (continued)

Held for trading (continued)

	31 December 2024
	Sell			Buy
		Notional			Notional
	Currency	amount		Currency	amount		Fair value			Maturity
Currency Forward Contracts	TRY		11,900,200	USD		297,500		(402,702	)	January 2025 - December 2025
Currency Swap	USD		16,750	RMB		120,943		(6,907	)	February 2025
	USD		10,822	EUR		10,103		(11,198	)	January 2025
Participating cross currency swap contracts	TRY		92,134	EUR		20,040		(122,149	)	April 2026
Options contracts	TRY		500,000	EUR		10,000		(41,175	)	November 2025
Interest swap contracts	USD		26,740	USD		26,740		(782	)	April 2026
								(584,913	)

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

14.

Derivative financial instruments (continued)

Fair value of derivative instrumentsand risk management

Fair value

This section explains the judgmentsand estimates made in determining the fair values of the financial instruments that are recognized and measured at fair value in thefinancial statements. To provide an indication of the reliability of the inputs used in determining fair value, the Group has classifiedits financial instruments into the three levels prescribed under the accounting standards. An explanation of each level is as follows:

·Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the entity can access atthe measurement date;

· Level 2 inputs areinputs, other than quoted prices included within Level 1, that are observable for the asset or liability, either directly or indirectly;and

· Level 3 inputs are unobservable inputs for the asset or liability.

	Fair Value hierarchy	Valuation Technique
a) Participating cross currency swap contracts	Level 2	Pricing models based on discounted cash presentvalue of the estimated future cash flows based on observable yield curves and end period FX rates
b) FX swap, currency, interest swap and option contracts	Level 2	Present value of the estimated future cash flows based on observable yield curves and end period FX rates
c) Currency forward contracts	Level 2	Forward exchange rates at the balance sheet date

TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

15.

Financial instruments

Impairment losses

Movements in the provision for trade receivables, contractassets, other assets and due from related parties are as follows:

	30 June 2025
	Contract Assets			Trade receivable and Other Assets
Opening balance		6,375			768,830
Provision for impairment recognized during the year		1,517			697,919
Amounts collected		-			(308,089	)
Receivables written off during the year as uncollectible		-			(314,910	)
Effect of changes in exchange rates		-			48,596
Inflation adjustment		(982	)		(115,950	)
Closing balance		6,910			776,396

	30 June 2024
	Contract Assets			Trade receivable and Other Assets
Opening balance		5,707			1,019,516
Provision for impairment recognized during the year		1,290			784,421
Amounts collected		-			(244,185	)
Receivables written off during the year as uncollectible		-			(456,331	)
Effect of changes in exchange rates		-			25,015
Inflation adjustment		(1,216	)		(209,289	)
Closing balance		5,781			919,147

Movements in the provisions for the total of receivables from financial services are as follows:

	30 June 2025			30 June 2024
Opening balance		188,412			247,544
Provision for impairment recognized during the year		219,344			182,035
Amounts collected		(94,541	)		(87,103	)
Receivables transferred with receivables transfer contract (*)		(52,419	)		(40,385	)
Inflation adjustment		(30,269	)		(52,652	)
Closing balance		230,527			249,439

(*) Turkcell Finansman signed a transferof claim agreement with a debt management company to transfer some of its doubtful receivables stemming from the years 2016 and 2024.Transferred doubtful receivables comprise of balances for which Turkcell Finansman had started legal proceedings.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

15.

Financial instruments

Foreign exchange risk

The Group’s exposure to foreign exchange risk at theend of the reporting period, based on notional amounts, was as follows:

	30 June 2025
	USD			EUR			RMB
Foreign currency denominated assets
Other non-current assets		69			11			-
Financial asset at fair value through other comprehensive income		382,594			124,538			-
Due from related parties - current		103			-			-
Trade receivables and contract assets		23,235			26,048			-
Other current assets		7,239			2,005			-
Cash and cash equivalents		460,834			1,867,085			126,242
		874,074			2,019,687			126,242
Foreigncurrency denominated liabilities
Loans and borrowings - non-current		(274,401	)		(605,903	)		(1,095,417	)
Debt securities issued - non-current		(1,424,362	)		-			-
Lease obligations - non-current		(195,352	)		(8,045	)		-
Other non-current liabilities		(39,697	)		-			-
Due to related parties		-			(5,480	)		-
Loans and borrowings - current		(125,913	)		(324,924	)		(198,269	)
Debt securities issued - current		(575,402	)		-			-
Lease obligations - current		(6,663	)		(1,224	)		-
Other current liabilities		-			(6,319	)		-
Trade and other payables - current		(172,016	)		(14,073	)		(158,640	)
		(2,813,806	)		(965,968	)		(1,452,326	)

Financial liabilities defined as hedging instruments (*)		4800			113,437			-
Exposure related to derivative instruments
Participating cross currency swap and FX swap contracts		1,514,007			(1,399,988	)		641,755
Currency forward contracts		619,328			(7,041	)		-
Net exposure		198,403			(239,873	)		(684,329	)

(*) Turkcell, the main shareholderof the Group, uses a loan amounting to EUR 56,576 as a hedging instrument to protect against foreign exchange risk arising from the translationof its net investments in a foreign subsidiary into Turkish Lira. The foreign exchange gains/losses related to this loan are recognizedunder equity in the “gains/losses on net investment hedge of a foreign operation” account, to be offset against the foreignexchange differences arising from the translation of the net assets of the foreign operation into Turkish Lira.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

15.

Financial instruments (continued)

Commodity Price Risk

On 14 April 2025, the Group investedin a gold deposit account equivalent to 15,662 ounces of gold. As of 30 June 2025, the fair value of the gold deposit account isTRY 2,075,077. Therefore, the Group’s profitability may be affected by changes in gold prices in the markets.

In the sensitivity analysis performed,it was assessed that a 10% increase in gold prices would result in a TRY 207,508 increase in profit or loss before tax, whereas a 10%decrease would result in a TRY (207,508) decrease in profit or loss before tax.

Sensitivity analysis

The basis for the sensitivity analysisto measure foreign exchange risk is an aggregate corporate-level currency exposure. The aggregate foreign exchange exposure is composedof all assets and liabilities denominated in foreign currencies; the analysis excludes net foreign currency investments.

A 10% strengthening/weakening of theTRY, BYN, EUR against the following currencies as at 30 June 2025 would have increased/(decreased) profit or loss before by theamounts shown below. This analysis assumes that all other variables, in particular interest rates, remain constant.

30 June 2025
	Profit/(Loss)						Equity
Sensitivity analysis	Appreciation of foreign currency			Depreciation of foreign currency			Appreciation of foreign currency			Depreciation of foreign currency
1- USD net asset/liability		886,554			(886,554	)		-			-
2- Hedged portion of USD risk (-)		-			-			(19,077	)		19,077
3- USD net effect (1+2)		886,554			(886,554	)		(19,077	)		19,077

4- EUR net asset/liability		(1,083,893	)		1,083,893			-			-
5- Hedged portion of EUR risk (-)		-			-			(264,703	)		264,703
6- EUR net effect (4+5)		(1,083,893	)		1,083,893			(264,703	)		264,703

7- Other foreign currency net asset/liability (RMB)		(377,216	)		377,216			-			-
8- Hedged portion of other foreign currency risk (-) (RMB)		-			-			-			-
9- Other foreign currency net effect (7+8)		(377,216	)		377,216			-			-
Total (3+6+9)		(574,555	)		574,555			(283,780	)		283,780

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

15.

Financial instruments (continued)

Financial assets:

Carrying values of a significant portionof financial assets do not differ significantly from their fair values due to their short-term nature.

Financial liabilities:

As at 30 June 2025 and 31 December 2024;for the majority of the borrowings, the fair values are not materially different to their carrying amounts since the interest payableon those borrowings is either close to current market rates or the borrowings are of a short-term nature.

The carrying amounts and fair valuesof non-current borrowings and current portion of non-current borrowings are as follows:

	Carrying amount		Fair value
As at 30 June 2025:
Bank loans		11,828,686		11,998,257
Debt securities		79,475,413		80,590,993

	Carrying amount		Fair value
As at 31 December 2024:
Bank loans		10,372,511		10,363,497
Debt securities		39,802,221		39,567,946

16.

Guarantees and purchase obligations

At 30 June 2025, outstanding purchasecommitments with respect to property, plant and equipment, inventory, advertising and sponsorship amount to TRY 4,411,866 (31 December 2024:TRY 4,996,321). Payments for these commitments will be made within 5 years.

The Group is contingently liable inrespect of letters of guarantee obtained from banks and given to public institutions and private entities, and financial guarantees providedto subsidiaries amounting to TRY 29,838,531 at 30 June 2025 (31 December 2024: TRY 23,932,025).

BeST has an investment commitment thatcovers the years 2022-2032 with a total investment amount of not less than USD 100,000, in accordance with the agreement which is signedbetween the Republic of Belarus, BeST and the Company on 30 November 2022. As of 30 June 2025, the remaining investment commitmentis amounting to USD 67,740 (TRY equivalent of 2,692,160).

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

17.	Commitments and Contingencies

The amounts related to the investigations,lawsuits, and inquiries shared below are disclosed with their nominal values as of 30 June 2025.

Disputes on Special CommunicationTax

Restructuring Act Compensation Lawsuitregarding the SCT for the term 2011

The Large Taxpayers Office levied SpecialCommunication Tax (SCT) and tax penalty on the Company for the term 2011, the Company filed application for restructuring the tax assessment,the application has rejected. The lawsuit filed against the rejection act, was finalized in favor of the Company.

As a result of this case, the Company,filed a lawsuit for the collection of TRY 47,405 principal receivable and TRY 36,000 damage accrued with a deferment interest. The Courtdecided to return TRY 47,269 principal receivable together with the deferred interest to be calculated as of the collection date. RegionalAdministrative Court rejected the appeal requests. The Council of State rejected the appeal requests and the case was finalized.

Disputes regarding the Law on theProtection of Competition

The Competition Board evaluated Articles4 and 6 of Law No. 4054 regarding the Company and imposed an administrative fine of TRY 91,942 in June, 2011 on the ground thatthe Company violated Article 6. The Company filed a lawsuit for the cancellation of the Board decision regarding the parts againstitself but the case was finalized against the Company in both the first-instance court and appeal stage. The Company made an individualapplication to the Constitutional Court, against the respective decision within due time. The Constitutional Court process is pending.

Also, the Large Taxpayers Office issueda payment order regarding the aforementioned administrative fine. The Company filed a lawsuit for the cancellation of the payment orderbut that case also was finalized against the Company. TRY 47,780 part of the administrative fine has been deducted from the receivablesthat the Company has earned as a result of another lawsuit. The remaining TRY 44,162 part of the administrative fine was paid in April 2022.

On the other hand three private companiesfiled a lawsuits against the Company in relation with this case claiming in total of TRY 112,084 for its material damages by reservingits rights for surpluses allegedly.

Among these cases, in the case filedfor the compensation of total TRY 110,484 material damages together with compensation amounting to three times of the damage and interest,a settlement was reached through mediation on 19 April 2024, and TRY 130,000 was paid by the Company on 3 May 2024. Accordingly,in the lawsuit between the parties, the court decided that there was no need to decide on the merits of the lawsuit that was not subjectto mediation and the decision became final.

Among these cases, in the case filedfor the compensation of total TRY 500 material damages, the Company objected to expert the report and the files has been sent to a newexpert committee. The expert report has been submitted to the case file. The parties have duly filed objections to the expert reportwithin the specified timeframe. In accordance with the parties’ objections, the court has resolved to obtain an additional reportfrom the same expert panel. The expert's supplementary report has been submitted to the case file. The Company will submit statementsand objections regarding the report within the specified timeframe. The other case was finalized in favor of the Company.

On the other hand, a third party fileda lawsuit for the cancellation of the part of the Competition Board stating that the Company did not violated Article 4 and theCouncil of State cancelled this part of the decision. Thereafter Competition Board launched a new investigation and as a result of itthe Competition Board decided to apply administrative fine amounting to TRY 91,942 in 2019, on the ground that the Company violated Article 4.Afterwards, The Competition Authority accepted some of the objections and reduced the administrative fine to TRY 61,294 with its decision.The aforementioned fine that amount of TRY 61,294 was paid discount, in the amount of TRY 45,971. A decision was made against

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

17.	Commitments and Contingencies (continued)

Disputes regarding the Law on theProtection of Competition (continued)

the Company at the first instance andappeal stages in the lawsuit that filed for cancellation of the fine. The appeal process is pending.

Disputes regarding the Law on theProtection of Competition – Investigation on gentleman's agreements for the labour market

The Competition Authority initiatedan investigation to ascertain whether there was a breach of Article 4 of Law No. 4054 through the establishment of gentleman'sagreements within the labor market. The Investigation Report was formally served to the Company on 7 May 2023. In response, theCompany submitted its written defense concerning the findings and conclusions, and an oral defense hearing was conducted on 13 February 2024.Following the investigation, it was resolved on 27 February 2024 to impose an administrative fine of TRY 57,301 on the Company.This amount has been recognized as a liability in the consolidated financial statements dated 30 June 2025. The reasoned decisionwas formally notified to the Company on 5 August 2025. The fine will be settled within one month from the date of notification witha 25% reduction, and an action for annulment will be brought against the decision.

ICTA Investigation Regarding theR&D Obligations

ICTA conducts annual investigationsto examine whether the company fulfills its obligations arising from the relevant legislation regarding the provision of a certain portionof its investments in the electronic communication network and communication services from suppliers with R&D centers in Turkey,a certain portion from products manufactured in Turkey by SME suppliers established to develop products or systems in Turkey, and a certainportion from products determined to be certified as domestic goods within the framework of the relevant legislation. As a result of theaudits carried out for the 2013-2018 period, a total of TRY 95,487 administrative fines were imposed on the company, and these fineswere paid in the amount of TRY 71,615 by taking advantage of the early payment discount, but the legal processes initiated for the cancellationof the fines are ongoing.

In addition, ICTA conducts routineinvestigations regarding 3G and 4.5G investment obligations. This review process is ongoing for the periods 2018-2021.

Refunds Investigation

ICTA examined whether the refund transactionsto subscribers were in compliance with the Board Decisions regulating the refund procedures for postpaid and prepaid subscribers. Asa result of the investigation, the Board imposed various administrative fines on the Company for the periods 2010-2018. The related administrativefines were paid in the previous years and the amount stated to be underpaid to the subscribers was paid on May 18, 2023 in the amountof TRY 98,333 together with late payment interest. The legal process initiated by the company, requesting the cancellation of the relevanttransaction and the fine, is pending in the appeal stage.

Turkcell and Superonline are currentlyundergoing refund investigations on a similar matter and Turkcell is currently undergoing an ongoing investigation on the Return of RemainingTRY on Prepaid Lines (01.03.2019-30.04.2021 Period). Verbal defense meetings were held on 29 April 2025 within the scope of theRefund Insvestigations (Board Decision No. 57) against Turkcell and Superonline. The verbal defense meeting for the ongoing Investigationon Return of Remaining TRY on Prepaid Lines regarding Turkcell was held on 18 February 2025. On the other hand, the Investigationon Return of TRY Remaining on Prepaid Lines for the next period (01.05.2021-30.09.2022 Period) has been initiated for our Turkcell theInvestigation Report including the findings of violations was notified to Company on 25 April 2025. Our written defense regardingthe violation findings in the Investigation Report was submitted to the ICTA on 26 May 2025.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

17.	Commitments and Contingencies (continued)

Investigation Regarding the SubscriptionAgreements (Anonymous Lines)

The ICTA initiated an investigationto examine whether the obligations regarding the establishment and implementation of subscription agreements and open lines were fulfilledand as a result of this investigation, the ICTA imposed an administrative fine of TRY 99,132 on the Company. The administrative finewas paid on 31 January 2024 as TRY 74,349 with early payment discount. The Company filed five separate lawsuits in total for thecancellation of the administrative fines and related transactions. The cases are pending. The examination process of a similar investigationsabout Number Porting (Turkcell) Subscription Agreements (Superonline) are also ongoing.

ICTA – Investigation on IdendityVerification Regulation

The ICTA stated that Turkcell and Superonlinefailed to comply with the face-to-face verification procedures of the Identity Verification Regulation and recorded biometric data intheir subscription processes. It was assessed that administrative fines could be imposed on Turkcell and Superonline for four separateviolations.

On the other hand, the ICTA has alsostated that may be take necessary measures for the scope of provision "...national security, public order or the proper executionof public service and the implementation of the provisions introduced by laws, to take over the facilities in return for compensationwhen necessary, to cancel the authorisation granted in case of non-payment of the authorisation fee within the specified period or incase of gross negligence.". Our written defenses were submitted to the ICTA on 11 March 2024. The investigations are ongoing.Within the scope of the investigation, a verbal defense meeting was held on 3 December 2024.

Violation of Board Decision (BoardDecision No. 412 – NetGSM) Inspection

An investigation was initiated againstour Company for not providing services (In violation of the relevant legislation and the Board Decision No. 2024/UK-ETD/412) toNetgsm's subscribers who want to receive services from our network through new subscription or number portability within the scope ofthe Virtual Mobile Network Service (VMMS) authorization. Within the scope of the investigation, our written explanations regarding theviolation determination were prepared and submitted to the ICTA. On 14 January 2025, a verbal defense meeting was held. A lawsuithas been filed for the annulment of Board Decision No. 2024/UK-ETD/412. The Court rejected the case. The Company appealed the decisionbefore the Regional Administrative Court.

Other Investigations Conducted byICTA

The ICTA may carry out routine or specificinvestigations to determine whether the relevant legislation is being complied with, and a summary of the content of the investigationsthat have already been concluded is presented below.

a) Investigationof compliance with the criteria and target values defined in the legislation regarding 3N and 4.5N Mobile Communication Systems,

b) Investigation of compliance with the obligation regarding mobile service quality notifications,

c) Investigationon whether the Company fulfills its obligations in relation to Value Added Electronic Communication Services,

d) Investigation of compliance with the legislation regarding subscription termination processes,

e) InvestigationRegarding the Non-Blocking of Calling Line Identification (CLI) in Violation of the Relevant Provisions of the Principles and Proceduresfor the Use of Calling Line Information as CLI

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

17.	Commitments and Contingencies (continued)

Other Investigations Conducted byICTA (continued)

All administrative fines imposed asa result of routine or specific inspections conducted by ICTA have been paid with early payment discount, and legal proceedings initiatedfor some of them in line with the opinions of the legal counsel for their cancellation are ongoing. The total amount of the related administrativefines paid in the past period is TRY 29,628.

a) Investigationregarding the compliance of the works and transactions carried out in the processes from the submission to the finalization of the facilitysharing request with the relevant legislation,

b) Investigationof whether the obligations defined in the Regulation on Consumer Rights in the Electronic Communications Sector and other relevant legislationregarding committed subscriptions are fulfilled

Other ongoing lawsuits and tax investigations

Probability of an outflow of resourcesembodying economic benefits for 2018 and 2019 fiscal years with regards to notification of Information and Communication TechnologiesAuthority for radio fee related to 2018 fiscal year was considered by the Company management. In this respect, TRY 128,429 was paid inNovember 2019 by reserving our right to take legal actions and legal actions were taken for 2018 fiscal year. The Court rejectedthe cases. The Company appealed the decisions before the Regional Administrative Court. The Regional Administrative Court rejected theappeal request. The Company appealed the decision in due time. The appeal process is pending. On the other hand, additional TRY 13,465for December 2018 was paid with reservation on 29 January 2021 with regards to notification of Information and CommunicationTechnologies Authority for the same reason. Upon the conclusion of three lawsuits against the Company, an individual application wasmade to the Constitutional Court and the process is ongoing.

General Assessment of Ongoing Litigationand Investigation

Based on the management opinion, anoutflow of resources embodying economic benefits is deemed as probable on some of the aforementioned lawsuits and investigations, thereis no additional provision recognized in the consolidated financial statements as at and for the period ended 30 June 2025 (31 December 2024:TRY 249,519). The provision allocated for ongoing investigations, inquiries, lawsuits, and audits represents the Company Management'sbest estimate; however, the results of these proceedings may differ from the Group's assessments.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

18.

Related parties

Transactions with key management personnel

Key management personnel comprise the Group's members ofthe Board of Directors and chief officers. There are no loans to key management personnel as of 30 June 2025 and 2024.

The Group provides additional benefits to key managementpersonnel and contributions to retirement plans based on a pre-determined ratio of compensation.

	30 June 2025		30 June 2024
Short-term benefits		191,215		179,915
Long-term benefits		467		-
Termination benefits		183		355
		191,865		180,270

The following transactions occurred with related parties:

	30 June		30 June
Revenue from related parties	2025		2024
Türk Telekom Mobil Iletisim Hizmetleri A.S. (“TT Mobil”) (*)		648,485		674,656
Enerji Piyasaları İşletme A.S. (“EPIAS”) (*)		235,408		203,730
Türk Hava Yolları A.S. (“THY”) (*)		222,889		269,891
Ziraat Bankası A.S. (“Ziraat Bankası”) (*)		139,224		112,131
Gunes Express Havacilik A.S. (“Sun Express”) (*)		139,090		140,815
Turk Telekomunikasyon A.S. (“TT”)(*)		81,846		78,385
TOGG (**)		71,954		39,868
Turksat Uydu Haberlesme Kablo TV ve Isletme A.S. (“Turksat”)(*)		68,671		100,230
TVF IFM Gayrimenkul Insaat ve Yonetim A.S. (*)		42,890		27,116
Turkiye Hayat ve Emeklilik A.S.(*)		41,182		53,608
Türkiye Sigorta A.Ş. ("Türkiye Sigorta")(*)		35,000		41,584
Turkiye Halk Bankası A.S. (“Halkbank”) (*)		28,717		24,271
Turkiye Vakiflar Bankası TAO (“Vakifbank”)(*)		27,730		22,821
Ziraat Katılım Bankasi A.S. (“Ziraat Katilim”)(*)		14,452		5,698
BIST (*)		8,140		6,358
Other		50,950		33,668
		1,856,628		1,834,830

(*) Related parties, which TVF directly and / or indirectlyhas control or joint control or significant influence.

(**) Related parties which is associate.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

18.

Related parties (continued)

	30 June		30 June
Related party expenses	2025		2024
Türk Telekomünikasyon A.S (*)		1,257,700		1,074,065
TT Mobil (*)		1,188,440		724,007
EPIAS (*)		697,468		411,875
Turkiye Vakiflar Bankası TAO (“Vakifbank”)(*)		664,324		20,022
T.C. Hazine ve Maliye Bakanlığı		150,627		142,336
Istanbul Takas ve Saklama Bankasi A.S. ("Takasbank") (*)		149,275		561,254
PTT (*)		77,546		67,414
Turksat (*)		51,810		38,409
Others		243,039		332,759
		4,480,229		3,372,141

(*) Related parties, which TVF directlyand / or indirectly has control or joint control or significant influence.

As of 30 June 2025, the Grouphas recognized a right-of-use asset amounting to TRY 8,245,472 and a lease liability amounting to TRY 7,923,109 in its statement of financialposition in accordance with the lease agreement signed with BOTAŞ. In relation to this agreement, an interest expense of TRY 131,722is included in the consolidated statement of profit or loss for the six-month interim period ended 30 June 2025.

Details of the financial assets andliabilities with related parties as of 30 June 2025 and 31 December 2024 are as follows:

	30 June			31 December
	2025			2024
Banks - Time deposits		17,100,529			29,922,497
Banks - Demand deposits		1,141,379			946,846
Receivables from reverse repo		60,743,857			14,437,191
Financial investment (*)		7,217,136			5,632,367
Bank borrowings		(4,698,804	)		(11,261,911	)
Debt securities issued		(575,674	)		(1,079,937	)
Lease liabilities		(8,672,016	)		(130,643	)
Impairment loss provision associated with bank deposits and other financial assets		(2,466	)		(4,341	)
		72,253,941			38,462,069

(*) Financial investments are consist of bonds and currencyprotected time deposit.

As of 30 June 2025, the amounts of letters of guaranteegiven to the related parties is TRY 2,219,396 (31 December 2024: TRY 683,138).

Details of the time deposits at related parties as of 30June 2025 and 31 December 2024 are as follows:

Details of the time deposits at related parties

	30 June		31 December
	2025		2024
Ziraat Bankasi		7,652,192		7,364,520
Ziraat Kat&inodot;l&inodot;m		5,483,944		4,910,583
Vakifbank		3,538,928		10,217,822
Halkbank		425,465		7,429,572
		17,100,529		29,922,497

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

18.

Related parties (continued)

Details of the reverse repo

Amount in Original Currency	Currency	Effective Interest Rate	Maturity	30 June 2025
4,843,490	EUR	2.25% - 4.00%	July - Aug 2025	60,743,857
				60,743,857

Details of the time deposits at related parties

Amount in Original Currency	Currency	Effective Interest Rate	Maturity	30 June 2025
224,120	EUR	1.9%	July 2025	10,440,452
3,448,051	TL	47.5%	July 2025	3,452,546
80,529	USD	3.5%	July 2025	3,207,531
				17,100,529

Details of the bank borrowings at related parties

Principle Amount	Currency	Effective Interest Rate	Maturity	30 June 2025
4,418,000	TL	41.0% - 53.0%	July 2025	4,445,829
235,000	TL	53.1%	August 2027	242,975
10,000	TL	47.5%	July 2025	10,000
				4,698,804

Details of the debt securities issued at related parties

Principle Amount	Currency	Effective Interest Rate	Maturity	30 June 2025
550,000	TL	40.0% - 46.5%	July 2025- September 2025	575,674
				575,674

Details of the lease liabilities at related parties

Currency	Effective Interest Rate	Maturity	30 June 2025
TL	12.75% - 62.25%	2025 - 2034	8,672,016
			8,672,016

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

18.

Related parties (continued)

Interest income to related parties

	30 June 2025		30 June 2024
Vakifbank		679,003		3,762,354
Ziraat Bankasi		559,493		487,316
Halkbank		336,808		1,264,906
Ziraat Kat&inodot;l&inodot;m		91,131		111,816
Other		643		1,342
		1,667,078		5,627,734

Interest expense to related parties

	30 June 2025		30 June 2024
Vakifbank		911,111		1,102,778
Halk Varl&inodot;k Kiralama A.S. ("Halk Varl&inodot;k Kiralama")		180,614		188,200
Ziraat Bankasi		1,790		78,828
Halkbank		2,171		15,046
Other		82		6,208
		1,095,768		1,391,060

The revenues obtained from the related partiesof the Group generally consist of telecommunications services, call center services, and other services. The transactions between theGroup and EP&Idot;A&Scedil; involve the provision of energy services; the transactions with BOTA&Scedil; involve the provisionof infrastructure services; the transactions with Halk Bank, Ziraat Bank, Ziraat Investment, and Vak&inodot;fbank involve bankingservices; the transactions with Türksat involve telecommunications services; and the transactions with BIST arise from stock exchangeactivities. The receivables from related parties are unsecured.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

19.

Subsidiaries

The Group’s ultimate parent company is TVF, while subsidiaries,associates and a joint venture of the Company as at 30 June 2025 and 31 December 2024 are as follows:

			Effective Ownership Interest
Subsidiaries Name	Country of Incorporation	Business	30 June 2025 (%)	31 December 2024 (%)
Turktell	Türkiye	Information technology, value added GSM services and entertainment investments	100	100
Turkcell Superonline	Türkiye	Telecommunications, television services and content services	100	100
Turkcell Dijital	Türkiye	Digitalization services and products	100	100
Turkcell Sat&inodot;&scedil;	Türkiye	Sales, delivery and digital sales services	100	100
Turkcell Teknoloji	Türkiye	Research and development	100	100
Turkcell Gayrimenkul	Türkiye	Property investments	100	100
Turkcell Enerji	Türkiye	Electricity energy trade and wholesale and retail electricity sales	100	100
Boyut Enerji	Türkiye	Electricity energy trade and wholesale and retail electricity sales	100	100
Turkcell Finansman	Türkiye	Consumer financing services	100	100
Turkcell Sigorta	Türkiye	Insurance agency activities	100	100
Turkcell Dijital Sigorta	Türkiye	Dijital agency activities	100	100
Turkcell Ödeme	Türkiye	Payment services and e-money license	100	100
Lifecell Dijital Servisler	Türkiye	Development and providing of digital services and products	100	100
Lifecell Bulut (***)	Türkiye	Cloud solutions services	-	100
Lifecell TV	Türkiye	Online radio, television and on-demand streaming services	100	100
Lifecell Müzik	Türkiye	Radio, television and on-demand streaming services	100	100
Global Tower	Türkiye	Telecommunications infrastructure business	100	100
Atmosware Teknoloji	Türkiye	Develop software products and services, training software developers	100	100
Beltower	Republic of Belarus	Telecommunications infrastructure business	100	100
Eastasian	Netherlands	Telecommunications investments	100	100
Kıbrıs Telekom	Turkish Republic of Northern Cyprus	Telecommunications	100	100
Lifecell Digital	Turkish Republic of Northern Cyprus	Telecommunications	100	100
Turkcell Dijital Technologies	Turkish Republic of Northern Cyprus	Electronic payment services	100	100
Turkcell Global Bilgi	Türkiye	Customer relations and human resources management	100	100
Rehberlik (*)	Türkiye	Directory assistance	-	100
Lifecell Ventures	Netherlands	Telecommunications investments	100	100
Paycell LLC (**)	Ukraine	Consumer financing services	100	100
Paycell Europe	Germany	Payment services and e-money	100	100
Yaani	Netherlands	Internet search engine and browser services	100	100
BiP B.V.	Netherlands	Providing digital services and products	100	100
BiP A.S.	Türkiye	Providing digital services and products	100	100
BeST	Republic of Belarus	Telecommunications	100	100
Turkcell GSYF	Türkiye	Venture capital investment fund	100	100
Sofra	Türkiye	Meal coupons and cards	100	100
Artel	Türkiye	Data processing	100	100
Ultia	Türkiye	Information technology	100	100
TDC	Türkiye	Data center and cloud services	100	100
Lifetech	Republic of Belarus	Information technology, programming and technical support	100	100

			Effective Ownership Interest
Associate Name	Country of Incorporation	Business	30 June 2025 (%)	31 December 2024 (%)
TOGG	Türkiye	Electric passenger car development, production and trading activities	23	23

(*) The liquidation process of Rehberlik Hizmetleri Servisi A.Ş.was completed as of 11 March 2025.

(**) As of 27 January 2025, it was decided to liquidate Paycell LLC,established in Ukraine.

(***) As of 7 May 2025, The Company was merged with Lifecell DijitalServisler.

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

20.

Investments accounted for using the equity method

The details of carrying values of investmentsaccounted for using the equity method are as follows:

a) Associates		30 June 2025			31 December 2024
TOGG		4,056,683			6,176,747

The movement of investments accounted for using the equitymethod is as follows

	30 June 2025		30 June 2024
Opening balance	6,176,747		9,887,512
Shares of profit	(2,120,064	)	(1,110,756	)
Closing balance	4,056,683		8,776,756

21.

Discontinued operations

As per the Group's Board of Directors' decisiondated 20 December 2023; a share transfer agreement was signed on 29 December 2023 for the transfer of all shares, along withall rights and debts, of Lifecell LLC, Global LLC, and Ukrtower, which are the Group's wholly owned subsidiaries.

As of 9 September 2024, cash amounting toTRY 17,777,962, was received by the Group in accordance with the share purchase agreement.

As of 9 September 2024, other receivablesrelated to the purchase amounting to TRY 677,553 were accrued. Upon completion of the closing transactions with the buyer on 4 August 2025,the amount was finalized at TRY 490,150. The difference of TRY 187,403 has been reported under discontinued operations in the currentperiod.

As at 30 June 2024, the statement of profitor loss of a disposal group for the year are presented below:

	1 January- 30June 2024
Revenue	6,997,385
Cost of revenue	(4,513,652	)
Gross profit	2,483,733
Selling and marketing expenses	(398,273	)
Administrative expenses	(254,171	)
Other operating income/(expense), net	27,423
Operating profit	1,858,712
Net finance costs / income	(69,975	)
Profit before income tax	1,788,737
Tax benefit /(expense)	(284,077	)
Profit/(loss) for the year from discontinued operations	1,504,660

TURKCELL İLETİŞİM HİZMETLERİA.Ş.

NOTES TO THE INTERIM CONDENSED CONSOLIDATED FINANCIALSTATEMENTS FOR THE SIX MONTHS PERIOD ENDED 30 JUNE 2025

21.

Discontinued operations (continued)

The net cash flows incurred by the disposal group are, as follows:

	1 January-
	30 June 2024
Cash flows from operating activities		4,113,700
Cash flows from investing activities		(1,849,096	)
Cash flows from financing activities		(731,881	)
Net cash (outflow)/inflow		1,532,723

	1 January-
	30 June 2024
Foreign currency translation reserve		8,554,676
Reserve of disposal group classified as held for sale		8,554,676

22.

Seasonality of operations

The Turkish mobile communications market is affectedby seasonal peaks and troughs. Historically, the effects of seasonality on mobile communications usage had positively influenced the Company’sresults in the second and third quarters of the fiscal year and negatively influenced the results in the first and fourth quarters ofthe fiscal year.

23.

Subsequent events

The redemption and coupon payment of the financingbond with a nominal amount of TRY 230,000, a maturity of 97 days and an annual simple interest rate of 46.00% was made on 2 July 2025.

Under the scope of the new issuance authorization,the Company submitted an application to the Capital Markets Board of Turkey (CMB) on 2 July 2025, for the approval of an issuancelimit for Sukuk Certificates with a nominal value of TRY 2,500,000.

The Company, a new Capital Markets Board (CMB)approval was obtained on 23 July 2025, valid for one year, for the issuance of Turkish Lira-denominated lease certificates basedon a management agreement, up to a total amount of TRY 2,000,000, to be issued domestically in different amounts and at different times,through private placement and/or sales to qualified investors without a public offering, in accordance with capital markets regulations.

Within the scope of the TRY 10,000,000 issuancelimit approved by the Capital Markets Board, the book building of the financing bond issuance of the Company with a maturity date of 20November 2025, an annual simple interest of 41.50% with a nominal amount of TRY 1,500,000 to qualified investors within Türkiye,without a public placement was completed, and the securities will be transferred to the investor accounts on 13 August 2025.

SIGNATURES

Pursuant to the requirementsof the Securities Exchange Act of 1934, Turkcell İletişim Hizmetleri A.Ş. has duly caused this report to be signed on its behalf by theundersigned, thereunto duly authorized.

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

Date: August 14, 2025	By:	/s/ Özlem Yardım
		Name:	Özlem Yardım
		Title:	Investor Relations Corporate Finance Director

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

Date: August 14, 2025	By:	/s/ Kamil Kalyon
		Name:	Kamil Kalyon
		Title:	Chief Financial Officer

	TURKCELL İLETİŞİM HİZMETLERİ A.Ş.

Date: August 14, 2025	By:	/s/ Nuri Burak Konuk
		Name:	Nuri Burak Konuk
		Title:	Group Financial Reporting Director